Electronic brake pedal

Abstract

The utility model discloses an electronic brake pedal which comprises a whole vehicle controller, a brake lamp driving circuit, a whole vehicle power supply, a pedal working power supply and a Hall chip with switching signal output. The whole vehicle power supply and the pedal working power supply are connected with the Hall chip and are used for providing power supply voltage for the Hall chip; the Hall chip is connected with the brake lamp driving circuit and the whole vehicle controller, when the Hall chip detects that the angle of the pedal changes, switching signals are output to the whole vehicle controller and the brake lamp driving circuit, the whole vehicle controller is connected with a whole vehicle power supply and a pedal working power supply, and the pedal working power supply is connected with the brake lamp driving circuit. When the whole vehicle power supply and the whole vehicle controller receive a switching signal output by the Hall chip, the pedal working power supply supplies power to the Hall chip, the brake lamp driving circuit receives the switching signal, and the brake lamp is turned on; the switch signal is directly used for driving the brake lamp, the response is sensitive, the brake lamp can be driven to be turned on only by slightly stepping on the electronic brake pedal, and the service life is not limited.

Description

Technical Field

[0001] This application relates to the field of electronic brake pedal technology, and specifically to an electronic brake pedal. Background Technology

[0002] With the continuous development of intelligent driving technology and the increasing electrification rate of automobiles, traditional mechanical parts can no longer meet the requirements of rapid and high-performance intelligent driving. In particular, in the field of braking, traditional braking relies on hydraulic transmission. Although it has been refined over decades and its quality and safety are stable enough, the response speed and precision of mechanical braking can no longer meet the requirements of intelligent driving. Electronic braking systems, on the other hand, transmit signals to the car's brakes in a way that can provide fast response time and precision. In conjunction with intelligent driving ADAS systems, ABS, ESP, ESC, etc., they can achieve better braking force distribution. Compared with traditional mechanical braking systems, they are lighter and do not require regular maintenance.

[0003] The electronic braking system here requires replacing the traditional mechanical brake pedal with an electronic brake pedal. The electronic brake pedal needs to have built-in electronic circuitry to transmit signals, sending the angle signal of the driver pressing the electronic brake pedal to the brake controller. The brake controller controls the wheel braking. Unlike the traditional mechanical pedal, the electronic brake pedal needs to have a sleep and wake-up function. The traditional mechanical pedal is de-energized after the vehicle is powered off, and cannot wake up the vehicle by pressing the brake. It can only provide a signal to the brake lights through a mechanical brake switch. However, in the context of automotive intelligence, electric vehicles are gradually eliminating the key ignition switch. Therefore, this application chooses the electronic brake pedal as the switch to wake up the vehicle and designs a safe and reliable electronic brake pedal that can quickly wake up the vehicle and illuminate the brake lights when the pedal is pressed slightly. Utility Model Content

[0004] To address the aforementioned issues, this application provides an electronic brake pedal. When the Hall chip detects a change in pedal angle, it outputs a switching signal to the vehicle controller and the brake light drive circuit. In other words, a slight press of the pedal can wake up the entire vehicle. It is highly responsive, and a slight press of the electronic brake pedal can also illuminate the brake lights. Furthermore, it has no lifespan limit.

[0005] The technical solution adopted in this application is:

[0006] This application provides an electronic brake pedal, including a vehicle controller, a brake light drive circuit, a vehicle power supply, a pedal operating power supply, and a Hall effect chip with switch signal output;

[0007] The vehicle power supply and pedal operating power supply are connected to the Hall chip to provide power voltage to the Hall chip;

[0008] The Hall chip is connected to the brake light drive circuit and the vehicle controller. The Hall chip is used to measure the pedal angle in real time. When the Hall chip detects a change in the pedal angle, it outputs a switch signal to the vehicle controller and the brake light drive circuit. When the Hall chip detects that the pedal has returned to the initial position, it stops outputting the switch signal.

[0009] The vehicle controller is connected to the pedal power supply. When the vehicle is powered off or the vehicle is not in motion, the pedal power supply is disconnected and the pedal is powered by the vehicle power supply. The Hall chip still measures the pedal angle in real time. When the vehicle controller receives the switch signal output by the Hall chip, it outputs a start signal to the pedal power supply, and the pedal power supply powers the Hall chip.

[0010] The brake light drive circuit is used to connect to the brake light. When the brake light drive circuit receives a switch signal, the brake light turns on.

[0011] Furthermore, the power supply voltage for the entire vehicle is 12V, and the power supply voltage for the pedals is 5V.

[0012] Furthermore, the Hall chip includes a switch signal output pin, a wake-up input pin, and two power input pins. The switch signal output pin is connected to both the vehicle controller and the brake light drive circuit. The wake-up input pin is connected to the vehicle controller. One of the power input pins is connected to the vehicle power supply, and the other power input pin is connected to the pedal operating power supply.

[0013] Furthermore, both the vehicle power supply and the pedal operating power supply are connected to two capacitors and a ferrite bead. The two capacitors and the ferrite bead form a π-type filter to reduce the interference of external high-frequency signals on the Hall chip and stabilize the input voltage of the vehicle power supply and the pedal operating power supply.

[0014] Furthermore, the brake lamp driving circuit includes a first MOSFET, a first LED, and a protection circuit; the gate of the first MOSFET is connected to the switch signal output pin of the Hall chip, the source of the first MOSFET is grounded, the drain of the first MOSFET is connected to the cathode of the first LED, the anode of the first LED is connected to the brake lamp power supply, and the protection circuit is connected to the first MOSFET to provide protection.

[0015] Furthermore, the protection circuit includes a first capacitor, a first resistor, and a second resistor; one end of the first capacitor is connected to the switch signal output pin of the Hall chip and one end of the first resistor, the other end of the first capacitor is grounded, the other end of the first resistor is connected to the gate of the first MOSFET, one end of the second resistor is connected to the other end of the first resistor and the gate of the first MOSFET, and the other end of the second resistor is grounded.

[0016] Furthermore, the brake light drive circuit also includes a third resistor, which is electrically connected between the drain of the first MOSFET and the cathode of the first LED.

[0017] The beneficial effects of this application are:

[0018] This application uses a Hall chip with a switch signal output. Utilizing the switch signal output function, when the pedal angle changes, causing a change in the magnetic field, the Hall chip outputs a switch signal. After the vehicle controller acquires this switch signal, the vehicle provides the power voltage for the pedal to operate normally. At the same time, this switch signal can be used to control the brake lights. Directly using the switch signal to drive the brake lights results in a sensitive response; only a slight press of the electronic brake pedal is needed to activate the brake lights, and there is no limit to the number of uses. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of an electronic brake pedal.

[0020] Figure 2 This is a schematic diagram of a Hall effect chip for an electronic brake pedal.

[0021] Figure 3 This is a circuit diagram of a brake light drive circuit for an electronic brake pedal. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings and a preferred embodiment.

[0023] This embodiment provides an electronic brake pedal, see reference. Figure 1The electronic brake pedal includes a vehicle controller (ECU), a brake light drive circuit, a vehicle power supply, a pedal operating power supply, and a Hall effect chip U1 with a switch signal output. The vehicle power supply and the pedal operating power supply are connected to the Hall effect chip U1 to provide power to it. The Hall effect chip U1 is connected to the brake light drive circuit and the vehicle controller (ECU). It measures the pedal angle in real time. When the Hall effect chip U1 detects a change in pedal angle, it outputs a switch signal to the vehicle controller (ECU) and the brake light drive circuit. When the Hall effect chip U1 detects that the pedal has returned to its initial position, it stops outputting the switch signal. The vehicle controller (ECU) is connected to the vehicle power supply and the pedal operating power supply. When the vehicle is powered off or not in motion, the pedal operating power supply is disconnected, and the pedal is powered by the vehicle power supply. The Hall effect chip continues to measure the pedal angle in real time. When the vehicle controller (ECU) receives the switch signal from the Hall effect chip U1, it outputs a start signal to the pedal operating power supply, which then powers the Hall effect chip U1. The brake light drive circuit is connected to the brake light. When the brake light drive circuit receives the switch signal, the brake light illuminates.

[0024] The vehicle power supply is specifically the battery power supply BAT, which has a power supply voltage of 12V. The 12V of the vehicle power supply provides constant power to the electronic brake pedal of this application, continuously providing power voltage to the pedal. The power supply voltage of the pedal working power supply is 5V, which provides working power to the pedal. When the vehicle is powered off, the vehicle controller ECU disconnects the 5V power supply to the pedal, or when the vehicle is not in motion, that is, when the Hall chip U1 detects that the pedal has not been pressed within 5 seconds of its initial position, the pedal enters a low-power mode. The 12V of the vehicle power supply provides a small current to the pedal in the low-power mode.

[0025] refer to Figure 2 The Hall effect chip U1 has multiple pins, including a switch signal output pin, a wake-up input pin, and two power input pins. The two power input pins are pin 3 and pin 11. Pin 3 is connected to the 12V vehicle power supply, and pin 11 is connected to the 5V pedal operating power supply. The switch signal output pin is pin 8, which is connected to both the vehicle controller ECU and the brake light drive circuit. The wake-up input pin is pin 4, which is connected to the vehicle controller ECU. When the Hall effect chip U1 detects a change in pedal angle, it outputs a wake-up signal to the vehicle controller ECU through the wake-up input pin. At this time, the internal system of the vehicle controller ECU, which realizes all functions, is started and can receive and execute commands or perform preset operations. The user can drive at any time while ensuring a comfortable driving experience.

[0026] Continue to refer to Figure 2The vehicle power supply for Hall chip U1 includes a capacitor filter port and a ferrite bead B1. Pin 3 is connected to one end of ferrite bead B1 and one end of capacitor C3. The other end of ferrite bead B1 is connected to one end of capacitor C2. The other ends of capacitor C2 and capacitor C3 are grounded. C2 and C3, together with ferrite bead B1, form a π-type filter to reduce interference from external high-frequency signals to Hall chip U1 and stabilize the input voltage of the vehicle power supply. The pedal power supply for Hall chip U1 includes a capacitor filter port and a ferrite bead B2. One end of capacitor C6 is grounded. The other end of capacitor C6 is connected to pin 11. Pin 11 is connected to one end of ferrite bead B2. The other end of ferrite bead B2 is connected to one end of capacitor C7 and the power supply. The other end of capacitor C7 is grounded. C6 and C7, together with ferrite bead B2, form a π-type filter to reduce interference from external high-frequency signals to Hall chip U1 and stabilize the input voltage of the pedal power supply. Pins 6 and 14 of Hall chip U1 are both test pins, which are directly connected to the internal data of Hall chip U1. Capacitors C4 and C5 are connected to pins 6 and 14 respectively to reduce the impact of external interference signals on the chip data.

[0027] refer to Figure 3 The brake light drive circuit includes a first MOSFET Q1, a first LED LED1, and a protection circuit. The gate of the first MOSFET Q1 is connected to the switch signal output pin 8 of the Hall chip U1, the source of the first MOSFET Q1 is grounded, the drain of the first MOSFET Q1 is connected to the cathode of the first LED LED1, and the anode of the first LED LED1 is connected to the brake light power supply. The protection circuit is connected to the first MOSFET Q1 to provide protection. The brake light circuit is integrated into the electronic brake pedal. When the first MOSFET Q1 receives the switch signal from the Hall chip U1, that is, when it receives a high-level signal, the first MOSFET turns on, and the first LED LED1 lights up.

[0028] Specifically, the protection circuit includes a first capacitor C1, a first resistor R1, and a second resistor R2. One end of the first capacitor C1 is connected to the switch signal output pin 8 of the Hall chip U1 and one end of the first resistor R1, and the other end of the first capacitor C1 is grounded. The other end of the first resistor R1 is connected to the gate of the first MOSFET Q1. One end of the second resistor R2 is connected to the other end of the first resistor R1 and the gate of the first MOSFET Q1, and the other end of the second resistor R2 is grounded. The first capacitor C1 is used for filtering, and the first resistor R1 and the second resistor R2 are used for voltage division and biasing to improve anti-interference capability. When the switch signal switch out input is high, the first MOSFET Q1 is turned on, and the brake light, i.e., the first LED LED1, is powered on and lit.

[0029] Specifically, the brake light drive circuit also includes a third resistor, which is electrically connected between the drain of the first MOSFET and the cathode of the first LED, for current limiting.

[0030] The workflow of this embodiment:

[0031] Normal operation mode enters sleep mode: After the vehicle is powered off, the vehicle controller ECU disconnects the 5V power supply to the pedal, or if the vehicle is not in motion, the pedal is detected to have not been pressed for 5 seconds in its initial position. At this time, the pedal operation enters low power mode, but the 12V battery power supply still provides a small current to the pedal in low power mode. In sleep mode, the Hall chip still measures the pedal angle in real time.

[0032] Sleep mode to normal operation: During the vehicle sleep mode, the driver has turned off the vehicle power or locked the vehicle and left. When the driver turns on the car again, enters the driver's seat, and presses the pedal, the Hall chip U1 senses the change in pedal angle and sends a signal out through the switch signal pin. When the vehicle controller ECU receives the switch signal, it wakes up the vehicle and re-energizes the electronic brake pedal. At the same time, the switch signal can provide a switch signal to the brake light drive circuit, and the brake lights will illuminate. In this state, the driver does not need to start the car with a key or one-button start. He can wake up the vehicle by pressing the pedal and then engage the gear to start the vehicle.

[0033] This application provides an electronic brake pedal. When the Hall chip U1 senses a change in the pedal angle, it outputs a switch signal to the vehicle controller ECU and the brake light drive circuit. The vehicle controller ECU provides the pedal with a 5V power supply for normal operation, and at the same time, the brake light illuminates. Simply pressing the pedal lightly will activate the brake light, and there is no limit to the number of times it can be used. At this time, the user can shift gears and start the vehicle.

[0034] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also within the protection scope of this application.

Claims

1. An electronic brake pedal, characterized by The brake lamp driving circuit, the vehicle power supply, the pedal power supply and the Hall chip are connected with the vehicle controller. The vehicle power supply and the pedal power supply are connected with the Hall chip, and are used for providing power voltage for the Hall chip. The Hall chip is connected with the brake lamp driving circuit and the vehicle controller, and is used for measuring the pedal angle in real time. When the Hall chip detects that the pedal angle changes, the Hall chip outputs a switching signal to the vehicle controller and the brake lamp driving circuit. When the Hall chip detects that the pedal returns to the initial position, the Hall chip stops outputting the switching signal.

2. An electronic brake pedal according to claim 1, characterized in that The vehicle controller and the pedal power supply are connected.

3. An electronic brake pedal according to claim 1, characterized in that When the vehicle controller receives the switching signal output by the Hall chip, the vehicle controller outputs a starting signal to the pedal power supply.

4. An electronic brake pedal according to claim 3, characterized in that The brake lamp driving circuit is used for being connected with the brake lamp.

5. An electronic brake pedal according to claim 1, characterized in that The power voltage of the vehicle power supply is 12V, and the power voltage of the pedal power supply is 5V. The Hall chip includes a switching signal output pin, a wake-up input pin and two power input pins.

6. An electronic brake pedal according to claim 5, characterized in that The switching signal output pin is connected with the vehicle controller and the brake lamp driving circuit. One of the power input pins is connected with the vehicle power supply, and the other power input pin is connected with the pedal power supply.

7. An electronic brake pedal according to claim 5, characterized in that The vehicle power supply and the pedal power supply are both connected with two capacitors and a magnetic bead. The two capacitors and the magnetic bead form a π-type filter, which is used for reducing the interference of external high-frequency signals on the Hall chip and stabilizing the input voltage of the vehicle power supply and the pedal power supply. The brake lamp driving circuit includes a first MOS tube, a first LED lamp and a protection circuit. The gate of the first MOS tube is connected with the switching signal output pin of the Hall chip. The source of the first MOS tube is grounded. The drain of the first MOS tube is connected with the cathode of the first LED lamp. The anode of the first LED lamp is connected with the brake lamp power supply. The protection circuit is connected with the first MOS tube, and is used for providing protection. The protection circuit includes a first capacitor, a first resistor and a second resistor. One end of the first capacitor is connected with the switching signal output pin of the Hall chip and one end of the first resistor. The other end of the first capacitor is grounded. The other end of the first resistor is connected with the gate of the first MOS tube. One end of the second resistor is connected with the other end of the first resistor and the gate of the first MOS tube. The other end of the second resistor is grounded. The brake lamp driving circuit further includes a third resistor. The third resistor is connected between the drain of the first MOS tube and the cathode of the first LED lamp.

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