Electronic throttle downshift oil replenishment device and method based on student formula racing car

Abstract

The invention discloses an electronic throttle downshift oil replenishing device and method based on a formula student racing car. The device comprises a controller, a throttle position sensor, a shift paddle sensor, a motor drive module and an electronic throttle body. An A / D conversion module, an interrupt module, a CAN bus module and a PWM module are integrated inside the controller. The throttle position sensor is connected to the A / D conversion module, the CAN bus module is connected to an on-board electronic control unit, the shift paddle sensor is connected to the interrupt module, the PWM module is connected to the motor drive module, the motor drive module is connected to the electronic throttle body, and the throttle position sensor is arranged at the position where the electronic throttle body is located. The invention has the advantages of providing a downshift oil replenishing device that meets the requirements of the formula student racing car, and solving the problem that the prior art lacks a downshift oil replenishing device for the formula student racing car.

Description

Technical Field

[0001] The present invention relates to the field of automobile electronic control, and more specifically to an electronic throttle downshift oil replenishment device and method based on a Formula Student racing car. Background Art

[0002] Formula One cars are usually manual transmissions, which require the driver's eyes, hands, and feet to work together. While observing the driving route, the driver must adjust the steering wheel and shift paddles in time according to environmental changes, and also needs to control the throttle. The driving intensity is relatively high, and often requires a high level of technical skills and physical strength from the driver, and the downshift and refueling operation further increases the difficulty of driving. Downshifting and refueling is generally a driving technique used in the process of cooperation between the engine and the manual transmission. When the gear is changed from a high gear to a low gear, on the basis of keeping the vehicle speed unchanged, the engine needs to provide a higher speed to achieve the appropriate torque to achieve the increase in the gear.

[0003] Reasonable downshifting and refueling can significantly reduce the downshifting shock of the racing car and improve the power performance and handling performance of the racing car. Downshifting and refueling are generally divided into manual downshifting and refueling performed by the driver based on experience and automatic downshifting and refueling performed by electronic device control. Compared with the two, the downshifting and refueling operation performed by electronic device control performs better in terms of maneuverability and downshifting smoothness. Compared with the manual downshifting and refueling operation performed by the driver based on experience, the downshifting and refueling performed by electronic device control has a more precise timing, which can effectively reduce the downshifting shock and improve the handling performance of the racing car. Even if the driver does not know how to manually downshift and refuel, it will not affect the downshifting smoothness and maneuverability of the racing car.

[0004] In Formula Student events, drivers usually manually downshift and add gas based on their driving experience. College students have insufficient experience in driving Formula Student cars and need to invest a lot of time in downshift and gas training. Furthermore, the timing of gas addition determined manually is not accurate.

[0005] Chinese patent publication number CN107339162A discloses an electronic throttle control system for a college student formula car, including a controller, a first signal input end of which is connected to the signal output end of an accelerator pedal module, a second signal input end of which is connected to the output end of a brake oil pressure sensor, a third signal input end of which is connected to the signal output end of a fault detection unit, and a signal output end of which is connected to the signal input end of an electronic throttle body through a motor drive circuit, and the electronic throttle body outputs a feedback signal to a fourth signal input end of the controller. The present invention is not only simple in structure, but also highly reliable, and has throttle position sensor fault detection, pedal position sensor fault detection, brake failure protection, and protection against dangerous behaviors caused by driver misoperation. It can be precisely controlled during the control process to ensure the handling stability and driving safety of the car. The invention aims to use an electronic throttle control system to replace the traditional cable-type throttle, that is, to detect the accelerator pedal position sensor signal and the throttle position sensor signal, and to control the throttle opening in combination with the vehicle state, thereby improving the handling and driving safety of the car. However, it does not involve downshifting and oil replenishment control. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the prior art lacks a downshift oil replenishing device and method for a Formula Student racing car.

[0007] The present invention solves the above technical problems through the following technical means: an electronic throttle downshift oil replenishing device based on a Formula Student racing car, comprising a controller, a throttle position sensor, a shift paddle sensor, a motor drive module and an electronic throttle body, wherein the controller internally integrates an A / D conversion module, an interrupt module, a CAN bus module and a PWM module, the throttle position sensor is connected to the A / D conversion module, the CAN bus module is connected to an on-board electronic control unit, the shift paddle sensor is connected to the interrupt module, the PWM module is connected to the motor drive module, the motor drive module is connected to the electronic throttle body, and the throttle position sensor is arranged at the position where the electronic throttle body is located;

[0008] The controller receives the upshift or downshift signal of the shift paddle sensor and the information of the on-board electronic control unit, obtains the corresponding throttle opening and opening duration according to the gear position signal and the information of the on-board electronic control unit, and outputs the control signal to the electronic throttle body through the PWM module and the motor drive module in sequence; the throttle position sensor detects the throttle position and feeds back to the A / D conversion module to realize downshift and oil replenishment.

[0009] The present invention receives the upshift or downshift signal of the shift paddle sensor and the information of the on-board electronic control unit through a controller, and the on-board electronic control unit determines whether the vehicle is in a driving state. If the vehicle is in a driving state, it will downshift and add fuel, thereby preventing the downshift and fuel addition from being triggered by accidental touch or engine shutdown. A downshift and fuel addition device that meets the requirements of the Formula Student racing car is provided, thereby solving the problem that the prior art lacks a downshift and fuel addition device for the Formula Student racing car.

[0010] Preferably, the electronic throttle downshift and oil replenishment device based on the Formula Student car also includes a sensor filter circuit, the sensor filter circuit includes a first resistor, an amplifier, a first diode, a second diode, a second resistor and a capacitor, one end of the first resistor is connected to the throttle position sensor, the other end of the first resistor is connected to the in-phase end of the amplifier, the inverting end of the amplifier is connected to the output end of the amplifier, the positive end of the power supply of the amplifier is connected to the 12V power supply, the negative end of the power supply of the amplifier is grounded, one end of the second resistor, the anode of the first diode and the anode of the second diode are all connected together and connected to the output end of the amplifier, the other end of the second resistor is connected to one end of the capacitor and the interface of the A / D conversion module, the other end of the capacitor and the cathode of the second diode are both grounded, and the cathode of the first diode is connected to the 5V power supply. The sensor filter circuit effectively filters out the signal outside the frequency range of the electronic throttle sensor signal in the signal, obtains the signal within the frequency range, and effectively eliminates noise and sharp points.

[0011] Preferably, the electronic throttle body includes a DC motor, a reduction mechanism, a return spring and a throttle valve plate, the DC motor is connected to the signal output end of the motor drive module, the DC motor is connected to the throttle valve plate through the reduction mechanism, the return spring is connected to the throttle valve plate, the throttle position sensor is installed on the throttle valve plate, and the signal output end of the throttle position sensor is connected to the interface of the A / D conversion module through the sensor filtering circuit.

[0012] Preferably, the model of the controller is MC9SXS128MAA.

[0013] Preferably, the CAN bus module is connected to the vehicle-mounted electronic control unit via a CAN bus transceiver, and the main chip model of the CAN bus transceiver is TJA1050.

[0014] Preferably, the motor drive module adopts an integrated IBT-2 motor drive system, pins 1, 2, 3, and 4 of the motor drive system are connected to the PWM signal output end of the controller, and pins 5 and 6 of the motor drive system are connected to the signal input end of the electronic throttle body.

[0015] Preferably, the throttle position sensor is a contactless bidirectional potentiometer sensor.

[0016] The present invention also provides a method for an electronic throttle downshift oil replenishment device based on a Formula Student racing car, the method comprising:

[0017] Step 1: determining whether the vehicle is in a driving state through the on-board electronic control unit. If the vehicle is in a driving state, the shift paddle sensor detects whether a downshift action occurs. If a downshift action occurs, the controller generates an interrupt signal through the interrupt module;

[0018] Step 2: The controller responds to the interrupt signal, executes the fuel replenishment program, and outputs control signals to the electronic throttle body through the PWM module and the motor drive module in sequence;

[0019] Step 3: The electronic throttle body receives the control signal, adjusts the throttle opening and the opening duration according to the control signal, and performs the fuel replenishment action;

[0020] Step 4: The throttle position sensor detects the throttle position and feeds back to the A / D conversion module. After the controller determines that the oil replenishment action is completed, the controller stops responding to the interrupt signal, stops outputting the control signal, and resets the electronic throttle body to the minimum opening.

[0021] The advantages of the present invention are:

[0022] (1) The present invention receives the upshift or downshift signal of the shift paddle sensor and the information of the on-board electronic control unit through a controller, and the on-board electronic control unit determines whether the vehicle is in a driving state. If the vehicle is in a driving state, it will downshift and add fuel to the engine, thereby preventing the downshift and oil replenishment from being triggered by accidental touch or engine shutdown. A downshift and oil replenishment device that meets the requirements of a Formula Student racing car is provided, thereby solving the problem that the prior art lacks a downshift and oil replenishment device for a Formula Student racing car.

[0023] (2) The device of the present invention meets the requirements of the Formula Student racing car. It integrates multiple controls and can meet the racing car's pursuit of power and handling stability. It has a simple structure and can share a controller with the electronic throttle body, which is conducive to reducing the cost of the controller.

[0024] (3) The throttle position sensor of the present invention is a contactless bidirectional potentiometer sensor, which adopts a redundant design to ensure the stability and safety of the system. The sensor filter circuit connected thereto effectively filters out the signal outside the frequency range of the electronic throttle sensor signal, obtains the signal within the frequency range, and effectively eliminates noise and sharp points.

[0025] (4) When the prior art downshift is just completed, the transmission ratio of the gearbox increases, the engine speed does not match the vehicle speed, and the engine braking force reduces the speed of the drive wheel, resulting in a sense of vehicle jerk. The downshift oil replenishment device developed in the present invention can increase the throttle opening when downshifting, increase the engine speed, match the engine speed after downshifting with the vehicle speed, and reduce the vehicle gear shifting jerk.

[0026] (5) The method provided by the present invention, when the device is powered on, must determine whether the vehicle is in a driving state through the on-board electronic control unit, otherwise the downshift and fuel replenishment operation cannot be triggered. When the engine is off, the downshift and fuel replenishment operation is prevented from being triggered by touching the shift paddle. During the fuel replenishment process, the throttle opening is monitored in real time to open and close according to the predetermined opening and duration to achieve closed-loop control. By using interrupt processing instead of querying, once the downshift signal is generated, the controller can immediately execute the downshift and fuel replenishment program, which has strong real-time performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural block diagram of the electronic throttle downshift and oil replenishment device based on the Formula Student car disclosed in Embodiment 1 of the present invention;

[0028] Figure 2 It is a schematic diagram of a sensor filter circuit in an electronic throttle downshift and oil replenishment device based on a Formula Student car disclosed in Embodiment 1 of the present invention;

[0029] Figure 3 It is a schematic diagram of a controller in an electronic throttle downshift and oil replenishment device based on a Formula Student racing car disclosed in Embodiment 1 of the present invention;

[0030] Figure 4 This is a schematic diagram of a main chip of a CAN bus transceiver in an electronic throttle downshift and fuel replenishment device based on a Formula Student car disclosed in Embodiment 1 of the present invention;

[0031] Figure 5 This is a flow chart of the electronic throttle downshift and fuel replenishment method based on the Formula Student car disclosed in Embodiment 2 of the present invention;

[0032] Figure 6 This is a program design flow chart of the electronic throttle downshift and fuel replenishment method based on the Formula Student car disclosed in Example 2 of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figure 1 As shown, an electronic throttle downshift and oil replenishment device based on a Formula Student racing car includes a controller, a throttle position sensor, a shift paddle sensor, a motor drive module and an electronic throttle body, wherein the controller internally integrates an A / D conversion module, an interrupt module, a CAN bus module and a PWM module, the throttle position sensor is connected to the A / D conversion module, the CAN bus module is connected to an on-board electronic control unit, the shift paddle sensor is connected to the interrupt module, the PWM module is connected to the motor drive module, the motor drive module is connected to the electronic throttle body, and the throttle position sensor is arranged at the position where the electronic throttle body is located;

[0036] The controller receives the upshift or downshift signal of the shift paddle sensor and the information of the on-board electronic control unit, obtains the corresponding throttle opening and opening duration according to the gear position signal and the information of the on-board electronic control unit, and outputs the control signal to the electronic throttle body through the PWM module and the motor drive module in sequence; the throttle position sensor detects the throttle position and feeds back to the A / D conversion module to realize downshift and oil replenishment.

[0037] like Figure 2 As shown, the electronic throttle downshift and oil replenishment device based on the student formula car also includes a sensor filter circuit, which includes a first resistor R6, an amplifier U3A, a first diode D3, a second diode D4, a second resistor R19 and a capacitor C19, one end of the first resistor R6 is connected to the throttle position sensor, the other end of the first resistor R6 is connected to the in-phase end of the amplifier U3A, the inverting end of the amplifier U3A is connected to the output end of the amplifier U3A, the positive end of the power supply of the amplifier U3A is connected to the 12V power supply, the negative end of the power supply of the amplifier U3A is grounded, one end of the second resistor R19, the anode of the first diode D3 and the anode of the second diode D4 are all connected together and connected to the output end of the amplifier U3A, the other end of the second resistor R19 is connected to one end of the capacitor C19 and the interface of the A / D conversion module (any one pin of AD0 to AD7 of the controller), the other end of the capacitor C19 and the cathode of the second diode D4 are both grounded, and the cathode of the first diode D3 is connected to the 5V power supply.

[0038] It should be noted that the throttle position sensor is a contactless bidirectional potentiometer sensor. Therefore, in practical applications, there are two sensor filter circuits, because the throttle position sensor is a contactless bidirectional potentiometer sensor, and each sensor is connected to a sensor filter circuit, which effectively filters out the signal outside the frequency range of the electronic throttle sensor signal, obtains the signal within the frequency range, and effectively eliminates noise and sharp points.

[0039] The electronic throttle body of the present invention is a prior art, and its structure and principle are briefly described below. The electronic throttle body includes a DC motor, a reduction mechanism, a return spring and a throttle valve plate. The DC motor is connected to the signal output end of the motor drive module, the DC motor is connected to the throttle valve plate through the reduction mechanism, the return spring is connected to the throttle valve plate, and the throttle position sensor is installed on the throttle valve plate. The signal output end of the throttle position sensor is connected to the interface of the A / D conversion module through the sensor filtering circuit.

[0040] like Figure 3 As shown, the model of the controller is MC9SXS128MAA. The internal memory of the controller is 128KB of FLASH; 2KB of EEPROM; 8KB of RAM; it has up to 91 general-purpose input / output (I / O) pins, and all input pins can be configured with pull-up / pull-down, and the driving force of all pins can be configured; it integrates a 16-channel, 12-bit AD conversion module, with 8-bit / 10-bit / 12-bit optional conversion bits, 3μs 10-bit single-channel conversion time, and the result data is left-aligned or right-aligned; it has a standard timer module TIM: 8-channel 16-bit input capture or output comparison, 16-bit free-running 8-bit precision prescaler counter, and 1 16-bit pulse accumulator; it has a pulse width modulator PWM (PWM module): up to 8-channel 8-bit or 4-channel 16-bit pulse width modulator, each channel has a programmable period and duty cycle, center or edge aligned output, programmable always select logic, and a wide frequency selection range; it has an MSCAN module: supports CAN2.0 There are two protocols, A and B, with a communication rate of up to 1Mb / s, two receive buffers, three send buffers, and four independent interrupt sources: send, receive, error, and wake-up. CAN has self-test, low-pass filtering, and wake-up functions.

[0041] It has an interrupt module, 7 levels of interrupt nesting, and each interrupt source can be flexibly assigned a priority level, including external non-maskable interrupts, external maskable interrupts, and internal interrupts; it has an internal phase-locked loop module PLL: no external components are required, and configurable options can be used to reduce EMC radiation. The CPU bus frequency can reach up to 40MHz. Figure 3 The peripheral circuits of the controller are common crystal oscillator circuits and filter circuits, which will not be explained in detail here.

[0042] like Figure 4 As shown, the main chip model of the CAN bus transceiver is TJA1050. The CAN bus module is connected to the vehicle electronic control unit through the CAN bus transceiver. TJA1050 is used to receive signals such as engine speed and water temperature from the ECU (vehicle electronic control unit). TJA1043 has good electromagnetic interference tolerance (EMI) and first-class ESD protection. When the power is turned off, it has extremely low power consumption similar to passive devices. The combination of these characteristics can ensure that the device operates as designed and is not affected by the expected electromagnetic environment.

[0043] The motor drive module adopts an integrated IBT-2 motor drive system, the 1, 2, 3, and 4 pins of the motor drive system are connected to the PWM signal output end of the controller, and the 5 and 6 pins of the motor drive system are connected to the signal input end of the electronic throttle body. The motor drive module amplifies the PWM control signal output by the controller and outputs it stably to control the DC motor in the electronic throttle body.

[0044] As a further improvement of the present invention, the present invention is provided with peripheral interfaces, including a motor drive module interface, an electronic throttle sensor interface, a shift paddle sensor signal input interface, etc. All peripherals of the circuit board adopt an interface design rather than being fixed together, which is convenient for maintenance and replacement of parts.

[0045] Through the above technical scheme, the electronic throttle downshift and oil replenishment device based on the student formula car provided in Example 1 of the present invention automatically opens the electronic throttle when downshifting through the controller, throttle position sensor, shift paddle sensor, motor drive module and electronic throttle body, so as to replace the traditional manual downshift and oil replenishment operation. The controller receives the upshift or downshift signal of the shift paddle sensor and the information of the on-board electronic control unit, and the on-board electronic control unit determines whether the vehicle is in a driving state. If it is in a driving state, it will downshift and replenish oil, so as to prevent the downshift from being triggered by accidental touch or engine shutdown. A downshift oil filling device that meets the requirements of a Formula Student racing car is provided to solve the problem that the prior art lacks a downshift oil filling device for a Formula Student racing car. Compared with the prior art, the present invention aims to use an automatic downshift oil filling operation controlled by an electronic device to replace the traditional manual downshift oil filling operation or no oil filling operation when downshifting, that is, to detect the signal of a shift paddle position sensor, accurately judge the timing of oil filling, increase the electronic throttle opening when downshifting, and do not need to train the driver to judge the timing of oil filling. The invention has the advantages of reducing the driver's operation amount, reducing gear shifting frustration, and improving the car's maneuverability.

[0046] Example 2

[0047] like Figure 5As shown, corresponding to the embodiment 1 of the present invention, the embodiment 2 of the present invention also provides a method for an electronic throttle downshift oil replenishment device based on a Formula Student racing car, the method comprising:

[0048] Step S1: determining whether the vehicle is in a driving state through the on-board electronic control unit. If the vehicle is in a driving state, the shift paddle sensor detects whether a downshift action occurs. If a downshift action occurs, the controller generates an interrupt signal through the interrupt module;

[0049] Step S2: the controller responds to the interrupt signal, executes the fuel replenishment program, and outputs control signals to the electronic throttle body through the PWM module and the motor drive module in sequence;

[0050] Step S3: the electronic throttle body receives the control signal, adjusts the throttle opening and the opening duration according to the control signal, and performs the fuel replenishment action;

[0051] Step S4: The throttle position sensor detects the throttle position and feeds back to the A / D conversion module. After the controller determines that the oil replenishment action is completed, the controller stops responding to the interrupt signal, stops outputting the control signal, and resets the electronic throttle body to the minimum opening.

[0052] like Figure 6 The flowchart of the method of the electronic throttle downshifting and oil replenishing device based on the Formula Student car is shown in the figure. In the figure, TFLG2-TOF represents the timer overflow flag. TFLG2-TOF=1 represents the timer overflow and the throttle opening time reaches the preset time. To facilitate the understanding of the method of the present invention, the program design process and principle are given below:

[0053] Power-on reset: The control system is powered on and each module is restored to its initial value.

[0054] Execute the main program: If the downshift fuel replenishment system shares a control chip with an electronic throttle control system, the electronic throttle control program is executed at this time; if the downshift fuel replenishment system uses an independent control chip, only the data sent by the ECU and the data of the throttle position sensor are collected at this time to determine whether the car is working normally. If no interruption occurs, the main program is run normally; if an interruption occurs, the throttle target position is modified to 20% of the original, responding to the electronic throttle control program.

[0055] Generate an interrupt: The downshift signal from the shift paddle sensor is connected to the interrupt module of the controller. When the downshift signal is generated, the interrupt module of the controller is triggered.

[0056] The electronic throttle control program is as follows:

[0057] 1. Calculate the throttle opening and duration for the best refueling effect based on the vehicle data sent by the ECU and the data from the throttle position sensor;

[0058] 2. Modify the throttle opening target value;

[0059] 3. Closed-loop control is achieved through the throttle position sensor, and the appropriate PWM control signal is calculated and output in real time during the refueling process through the PID algorithm;

[0060] 4. The controller's TIM module timer is assigned an initial value so that its PWM control signal is output according to the predetermined duration;

[0061] 5. The timer overflows and the PWM control signal stops outputting;

[0062] 6. Clear the timer overflow flag;

[0063] 7. Return to the main program.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic throttle downshift and oil replenishment device based on a Formula Student car, characterized in that: It includes a controller, a throttle position sensor, a shift paddle sensor, a motor drive module and an electronic throttle body. The controller integrates an A / D conversion module, an interrupt module, a CAN bus module and a PWM module. The throttle position sensor is connected to the A / D conversion module, the CAN bus module is connected to the vehicle-mounted electronic control unit, the shift paddle sensor is connected to the interrupt module, the PWM module is connected to the motor drive module, the motor drive module is connected to the electronic throttle body, and the throttle position sensor is arranged at the position where the electronic throttle body is located. The controller receives the downshift signal of the shift paddle sensor and the information of the on-board electronic control unit, obtains the corresponding throttle opening and opening duration according to the gear position signal and the information of the on-board electronic control unit, and outputs the control signal to the electronic throttle body through the PWM module and the motor drive module in sequence; the throttle position sensor detects the throttle position and feeds back to the A / D conversion module to realize downshift and fuel replenishment.

2. The electronic throttle downshift and oil replenishment device based on the Formula Student car according to claim 1 is characterized in that: It also includes a sensor filter circuit, which includes a first resistor, an amplifier, a first diode, a second diode, a second resistor and a capacitor. One end of the first resistor is connected to the throttle position sensor, the other end of the first resistor is connected to the in-phase end of the amplifier, the inverting end of the amplifier is connected to the output end of the amplifier, the positive end of the amplifier power supply is connected to a 12V power supply, the negative end of the amplifier power supply is grounded, one end of the second resistor, the anode of the first diode and the anode of the second diode are all connected together and connected to the output end of the amplifier, the other end of the second resistor is connected to one end of the capacitor and the interface of the A / D conversion module, the other end of the capacitor and the cathode of the second diode are both grounded, and the cathode of the first diode is connected to a 5V power supply.

3. The electronic throttle downshift and oil replenishment device based on the Formula Student car according to claim 2 is characterized in that: The electronic throttle body includes a DC motor, a reduction mechanism, a return spring and a throttle valve plate. The DC motor is connected to the signal output end of the motor drive module, the DC motor is connected to the throttle valve plate through the reduction mechanism, the return spring is connected to the throttle valve plate, the throttle position sensor is installed on the throttle valve plate, and the signal output end of the throttle position sensor is connected to the interface of the A / D conversion module through the sensor filter circuit.

4. The electronic throttle downshift and oil replenishment device based on the Formula Student car according to claim 1, characterized in that: The model of the controller is MC9SXS128MAA.

5. The electronic throttle downshift and oil replenishment device based on the Formula Student car according to claim 1, characterized in that: The CAN bus module is connected to the vehicle-mounted electronic control unit via a CAN bus transceiver, and the main chip model of the CAN bus transceiver is TJA1050.

6. The electronic throttle downshift and oil replenishment device based on the Formula Student car according to claim 1, characterized in that: The motor drive module adopts an integrated IBT-2 motor drive system, and the 1, 2, 3, and 4 pins of the motor drive system are all connected to the PWM signal output end of the PWM module in the controller, and the 5 and 6 pins of the motor drive system are all connected to the signal input end of the electronic throttle body.

7. The electronic throttle downshift and oil replenishment device based on the Formula Student car according to claim 1, characterized in that: The throttle position sensor is a contactless bidirectional potentiometer sensor.

8. The downshift and oil replenishment method of the electronic throttle downshift and oil replenishment device based on the Formula Student car according to any one of claims 1 to 7, characterized in that: The method comprises: Step 1: determining whether the vehicle is in a driving state through the on-board electronic control unit. If the vehicle is in a driving state, the shift paddle sensor detects whether a downshift action occurs. If a downshift action occurs, the controller generates an interrupt signal through the interrupt module; Step 2: The controller responds to the interrupt signal, executes the fuel replenishment program, and outputs control signals to the electronic throttle body through the PWM module and the motor drive module in sequence; Step 3: The electronic throttle body receives the control signal, adjusts the throttle opening and the opening duration according to the control signal, and performs the fuel replenishment action; Step 4: The throttle position sensor detects the throttle position and feeds back to the A / D conversion module. After the controller determines that the oil replenishment action is completed, the controller stops responding to the interrupt signal, stops outputting the control signal, and resets the electronic throttle body to the minimum opening.

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