Brake pedal device, control system and automobile

Abstract

The invention provides a brake pedal device, a control system and an automobile. The brake pedal device comprises a pedal base, a pedal arm, a return spring assembly and a pedal control assembly. One end of the pedal arm is rotatably mounted on the pedal base, and a pedal surface is arranged at the other end of the pedal arm; the return spring assembly is installed between the pedal arm and the pedal base and used for driving the pedal arm to rotate around the pedal base. The pedal control assembly is installed on the pedal base, connected with the pedal arm and used for monitoring the state of a pedal and outputting a pedal braking signal. According to the brake-by-wire pedal device, the pedal base, the pedal arm, the return spring assembly and the pedal control assembly are combined to form the brake-by-wire pedal device, the pedal base is not limited by a mounting interface any more, original mechanical push rod connection is omitted, the size of the pedal can be reduced, the weight of the whole device is reduced, and vehicle body arrangement is more flexible.

Description

Technical Field

[0001] The invention belongs to the technical field of brake pedal devices, and in particular relates to a brake pedal device, a control system and a car. Background Art

[0002] As the trend of electrification and intelligence continues to be applied in the automotive field, the requirements for vehicle intelligent driving are getting higher and higher. As a very important part of the car, the vehicle braking system has a great impact on the user's safe driving and intelligent driving operation.

[0003] Existing brake pedal device such as Figure 1 As shown, it generally includes components such as a pedal arm, a pedal base, and a return spring assembly. The pedal arm is connected to the brake push rod through a ball pin. The pedal base is reserved for installing a brake light switch and an accelerator pedal device. Tension or compression springs are set on the pedal arm and the base as needed to enhance the brake pedal feel. When service braking is required, the pedal arm is stepped on, and the pedal arm compresses the push rod of the electronic hydraulic brake system (EHB) through the connection ball bowl. The EHB records the pedal depth through an internal sensor and calculates the braking force required by the vehicle based on the pedal depth, vehicle speed and other conditions. When the pedal arm is stepped on, the brake light switch installed on the pedal base is turned on and the brake light is lit. In addition, a tension or compression spring is set between the pedal arm and the base to enhance the brake pedal feel.

[0004] However, the existing brake pedal device is only a mechanical structure with large size and weight, and only transmits mechanical characteristics with a single function. The brake pedal base is limited by the layout and installation interface of the vacuum booster or electronic hydraulic brake system (EHB), and the size and layout of the pedal base are relatively fixed, and its performance is poor, which cannot meet the user's driving experience. Summary of the invention

[0005] The invention provides a brake pedal device, a control system and a car to solve the problem that the existing brake pedal device only transmits mechanical characteristics, has a single function and poor performance.

[0006] A brake pedal device includes a pedal base, a pedal arm, a return spring assembly and a pedal control assembly;

[0007] One end of the pedal arm is rotatably mounted on the pedal base, and the other end is provided with a pedal surface;

[0008] The return spring assembly is installed between the pedal arm and the pedal base, and is used to drive the pedal arm to rotate around the pedal base;

[0009] The pedal control assembly is installed on the pedal base and connected to the pedal arm, and is used to monitor the pedal state and output a pedal brake signal.

[0010] Preferably, a rotating shaft is provided on the pedal base, and one end of the pedal arm is rotatably mounted on the rotating shaft;

[0011] The brake pedal device also includes a first limit block and a second limit block;

[0012] The first limit block is arranged on the pedal base at a position close to the rotating shaft, corresponding to one end of the pedal arm;

[0013] The second limit block is arranged on the pedal base at a position away from the rotation axis and intersects with the projection of the pedal arm on the pedal base;

[0014] The first limit block cooperates with the second limit block to limit the rotational travel of the pedal arm.

[0015] Preferably, the second limit block comprises a limit block body, two limit walls extending from two side edges of the limit block body in the same direction, the limit block body and the two limit walls cooperate to form a fixing groove, and the second limit block intersects perpendicularly with the projection of the pedal arm on the pedal base;

[0016] The first end of the return spring assembly is installed in the fixing groove, and the second end of the return spring assembly is connected to the pedal arm.

[0017] Preferably, the return spring assembly comprises a first spring seat, a first spring, a second spring seat, a second spring and a third spring seat which are arranged concentrically;

[0018] The first spring seat is connected to the pedal arm, the third spring seat is mounted on the pedal base, and the second spring seat is arranged between the first spring seat and the third spring seat;

[0019] The first end of the first spring is connected to the first spring seat, and the second end of the first spring is connected to the first end of the second spring seat; the first end of the second spring is connected to the second end of the second spring seat, and the second end of the second spring is connected to the third spring seat.

[0020] Preferably, the return spring assembly further comprises a spring guide rod and a damping block;

[0021] The spring guide rod is inserted into the first spring, the second spring seat and the second spring;

[0022] One end of the spring guide rod is connected to the first spring seat through the damping block, and the other end of the spring guide rod is connected to the third spring seat through the damping block.

[0023] Preferably, the pedal control assembly comprises a pedal depth sensor, a sensor fork and a module body;

[0024] The pedal depth sensor is mounted on the pedal base, the first end of the sensor fork is rotatably mounted on the connecting shaft of the pedal depth sensor, and the second end of the sensor fork is connected to the pedal arm;

[0025] The module body is mounted on the connecting shaft of the pedal depth sensor, is electrically connected to the sensor fork, monitors the pedal state, and outputs a pedal brake signal.

[0026] Preferably, the sensor fork comprises an adapter sleeve and two fork arms extending from the adapter sleeve along the same radial direction;

[0027] The two shift fork arms cooperate with the adapter sleeve to form a slide groove, and the pedal control assembly also includes a shift fork pin;

[0028] The shift fork pin is installed in the slide groove, one end of the shift fork pin is fixed on the pedal arm, and moves in the slide groove along with the rotation of the pedal arm.

[0029] Preferably, the pedal control assembly further comprises two Hall sensors and a pedal control unit disposed in the module body;

[0030] The two Hall sensors are arranged side by side and parallel to the axis direction of the connecting shaft of the pedal depth sensor, and are used to perform signal verification on the pedal depth sensor and output a voltage signal corresponding to the pedal state;

[0031] The pedal control unit and the two Hall sensors are used to output a pedal braking signal according to the voltage signal output by the Hall sensors.

[0032] Preferably, a plurality of energy-absorbing and weight-reducing holes are provided on the pedal arm.

[0033] A brake pedal control system, comprising the brake pedal device, an intelligent driving module and a brake control unit;

[0034] The brake pedal device is provided with a pedal control unit for monitoring the pedal state and outputting a pedal brake signal;

[0035] The intelligent driving module is used to output the current driving mode;

[0036] The brake control unit is used to implement wheel-end braking based on the pedal brake signal and the current driving mode.

[0037] Preferably, the braking control unit is used to implement wheel-end braking and control the operation of the pedal control unit according to the pedal braking signal when the current driving mode is the intelligent driving mode; and to exit control of the pedal control unit when the current driving mode is the non-intelligent driving mode.

[0038] An automobile comprises the brake pedal control system.

[0039] In the present invention, the pedal base is used as the installation base of the brake pedal device, one end of the pedal arm is rotatably installed on the pedal base, and the other end is provided with a pedal surface. The pedal surface is an appearance component designed according to the front of the shape, and its position and size meet the human-machine requirements. It is also a human-machine operation contact component and is used for driving brake operation. The return spring assembly is installed between the pedal arm and the pedal base. When the pedal surface is stepped on, pressure is applied to the pedal arm so that it rotates clockwise around the pedal base to compress the return spring assembly. When the pedal arm is released, the pedal arm is not subjected to force, and the elasticity of the return spring assembly is used to rotate the pedal arm counterclockwise around the pedal base to return to its original position. The return spring assembly is used to provide a restoring force to the pedal arm and generate a restoring force hysteresis effect to achieve a human-machine pedal feel. The pedal control assembly integrates sensors, pedal control units and other components, and has connectors for internal and external communication. It is installed on the pedal base and connected to the pedal arm. When the pedal arm rotates, the pedal control assembly can monitor the pedal status and output a pedal braking signal. The pedal base, pedal arm, return spring assembly and pedal control assembly are combined to form a wire-controlled brake pedal device. Compared with the existing brake pedal device, the pedal base is no longer restricted by the installation interface (such as vacuum booster, EHB body, etc.), and the original mechanical push rod connection is cancelled, which can reduce the size of the pedal, reduce the weight of the entire device, and make the vehicle body layout more flexible. The pedal control assembly interacts with other modules through wire control on the basis of transmitting a single mechanical characteristic, and sends braking demand-related signals to the bus after its own processing and calculation, thereby improving the function and performance of the device and satisfying the user's driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural diagram of a brake pedal device in the prior art;

[0041] Figure 2 is a three-dimensional diagram of the initial state of the brake pedal device of the present invention;

[0042] Figure 3 is a three-dimensional diagram of the brake pedal device of the present invention in the final state;

[0043] Figure 4 is a three-dimensional diagram of the return spring assembly of the present invention;

[0044] Figure 5is an enlarged view of the pedal control assembly of the present invention;

[0045] Figure 6 It is the interaction diagram of the pedal control assembly in the present invention.

[0046] Among them, 1. pedal base; 2. pedal arm; 3. return spring assembly; 31. first spring seat; 32. first spring; 33. second spring seat; 34. second spring; 35. third spring seat; 36. spring guide rod; 37. damping block; 4. pedal control assembly; 41. pedal depth sensor; 42. sensor fork; 421. adapter sleeve; 422. fork arm; 43. module body; 44. slide groove; 45. fork pin; 5. pedal surface; 6. first limit block; 7. second limit block; 71. limit block body; 72. limit wall; 8. fixing groove; 9. energy absorption and weight reduction hole; 10. rotating shaft. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] An embodiment of the present invention provides a brake pedal device, referring to Figure 2 and Figure 3The brake pedal device includes a pedal base 1, a pedal arm 2, a return spring assembly 3 and a pedal control assembly 4. One end of the pedal arm 2 is rotatably mounted on the pedal base 1, and the other end is provided with a pedal surface 5; the return spring assembly 3 is mounted between the pedal arm 2 and the pedal base 1, and is used to drive the pedal arm 2 to rotate around the pedal base 1; the pedal control assembly 4 is mounted on the pedal base 1 and connected to the pedal arm 2, and is used to monitor the pedal state and output a pedal braking signal.

[0051] As an example, the pedal base 1 is used as the installation base of the brake pedal device, and has a mounting bushing, which is installed on the front panel of the vehicle body through a nut. One end of the pedal arm 2 is rotatably installed on the pedal base 1, and the other end is provided with a pedal surface 5. The pedal surface 5 is an appearance component designed according to the front of the shape. Its position and size meet the human-machine requirements. It is also a human-machine operation contact component for driving brake operation. The pedal arm 2 includes a first connecting arm and a second connecting arm extending upward along an arc from one end of the first connecting arm. The second connecting arm is provided with a pedal surface 5; one end of the first connecting arm of the pedal arm 2 rotates around the pedal base 1. The return spring assembly 3 is installed between the pedal arm 2 and the pedal base 1. When the pedal surface 5 is stepped on, pressure is applied to the pedal arm 2 so that it rotates clockwise around the pedal base 1 to compress the return spring assembly 3. When the pedal arm 2 is released, the pedal arm 2 is not subjected to force. The elasticity of the return spring assembly 3 is utilized to make the pedal arm 2 rotate counterclockwise around the pedal base 1 to return to its original position. The return spring assembly 3 is used to provide a restoring force to the pedal arm 2 and generate a restoring force hysteresis effect to achieve a human-machine pedal feel. The pedal control assembly 4 integrates components such as sensors and a pedal control unit, and is provided with connectors for internal and external communication. It is installed on the pedal base 1 and connected to the pedal arm 2. When the pedal arm 2 rotates, the pedal control assembly 4 can monitor the pedal state and output a pedal braking signal. The pedal base 1, the pedal arm 2, the return spring assembly 3 and the pedal control assembly 4 are arranged in this way to form a wire-controlled brake pedal device. Compared with the existing brake pedal device, the pedal base 1 is no longer restricted by the installation interface (such as a vacuum booster, an EHB body, etc.), and the original mechanical push rod connection is cancelled, which can reduce the size of the pedal, reduce the weight of the entire device, and make the vehicle body layout more flexible. The pedal control assembly 4 interacts with other modules through wire control on the basis of transmitting a single mechanical characteristic, and sends a braking demand-related signal to the bus after its own processing and calculation, thereby improving the function and performance of the device and satisfying the user's driving experience.

[0052] In this embodiment, when service braking is required, the pedal surface 5 is depressed a certain distance, that is, it is below the highest position, and the pedal arm 2 is subjected to the restoring force of the return spring assembly 3, and the restoring force is balanced with the pedal force acting on the pedal surface 5; when the pedal arm 2 rotates around the pedal base 1, the pedal control assembly 4 can monitor the pedal state and output a pedal braking signal to make the brake pedal device enter the intelligent braking mode, thereby controlling the pedal to start braking. While meeting the vehicle's service braking needs, the function and performance of the brake pedal device are optimized and improved, thereby having a certain improvement effect on the intelligent driving experience.

[0053] In one embodiment, referring to Figure 2 and Figure 3 A rotating shaft 10 is provided on the pedal base 1, and one end of the pedal arm 2 is rotatably mounted on the rotating shaft 10; the brake pedal device also includes a first limit block 6 and a second limit block 7; the first limit block 6 is arranged on the pedal base 1 at a position close to the rotating shaft 10, corresponding to one end of the pedal arm 2; the second limit block 7 is arranged on the pedal base 1 at a position away from the rotating shaft 10, and is located at the intersection of the projection of the pedal arm 2 on the pedal base 1; the first limit block 6 cooperates with the second limit block 7 to limit the rotation stroke of the pedal arm 2.

[0054] As an example, two support plates parallel to each other are provided on the pedal base 1, and a rotation position is formed between the two support plates. Two opposite mounting holes are provided on the two support plates. A rotating shaft 10 is provided on the pedal base 1, and the rotating shaft 10 passes through the two mounting holes. One end of the pedal arm 2 is rotatably mounted on the rotating shaft 10. The two support plates parallel to each other can limit the pedal arm 2 to prevent the pedal arm 2 from deviating left and right, thereby ensuring smooth rotation of the pedal arm 2. The brake pedal device also includes a first limit block 6 and a second limit block 7. When no driving force is applied to the pedal arm 2, the pedal arm 2 will rotate counterclockwise under the elastic force of the return spring assembly 3. The first limit block 6 is arranged on the pedal base 1 at a position close to the rotating axis 10, corresponding to one end of the pedal arm 2, and can limit the counterclockwise rotation angle of the pedal arm 2 to prevent the pedal surface 5 from being too high when the pedal arm 2 is in the initial position, which is inconvenient for the user to step on; when the user steps on the pedal surface 5, the pedal arm 2 will rotate clockwise to compress the return spring assembly 3. The second limit block 7 is arranged on the pedal base 1 at a position away from the rotating axis 10, and is located at the intersection of the projection of the pedal arm 2 on the pedal base 1, which can limit the clockwise rotation angle of the pedal arm 2. When the pedal surface 5 is stepped on to the bottom, it is in the lowest position (the end human-machine position), which prevents the pedal arm 2 from rotating excessively clockwise and hitting the pedal base 1 when it is in the end position, causing damage to parts. The first limit block 6 cooperates with the second limit block 7 to limit the rotational travel of the pedal arm 2. The movement distance of the center point of the pedal surface 5 is the pedal travel, which is divided into an angular travel and a linear travel.

[0055] In one embodiment, referring to Figure 2 and Figure 3 The second limit block 7 includes a limit block body 71 and two limit walls 72 extending from the two side edges of the limit block body 71 in the same direction. The limit block body 71 and the two limit walls 72 cooperate to form a fixed groove 8. The second limit block 7 intersects vertically with the projection of the pedal arm 2 on the pedal base 1; the first end of the return spring assembly 3 is installed in the fixed groove 8, and the second end of the return spring assembly 3 is connected to the pedal arm 2.

[0056] As an example, the second limit block 7 includes a limit block body 71 and two limit walls 72 extending from the two side edges of the limit block body 71 in the same direction. The second limit block 7 intersects vertically with the projection of the pedal arm 2 on the pedal base 1, and can effectively limit the rotation of the pedal arm 2; the limit block body 71 and the two limit walls 72 cooperate to form a fixed groove 8, and the first end of the return spring assembly 3 is installed in the fixed groove 8, and the second end of the return spring assembly 3 is connected to the pedal arm 2. Such an arrangement can limit the pedal arm 2, avoid the return spring assembly 3 from being exposed to the outside world, and protect the return spring assembly 3.

[0057] In one embodiment, referring to Figure 4 The return spring assembly 3 includes a first spring seat 31, a first spring 32, a second spring seat 33, a second spring 34 and a third spring seat 35 which are arranged concentrically; the first spring seat 31 is connected to the pedal arm 2, the third spring seat 35 is installed on the pedal base 1, and the second spring seat 33 is arranged between the first spring seat 31 and the third spring seat 35; the first end of the first spring 32 is connected to the first spring seat 31, and the second end of the first spring 32 is connected to the first end of the second spring seat 33; the first end of the second spring 34 is connected to the second end of the second spring seat 33, and the second end of the second spring 34 is connected to the third spring seat 35.

[0058] As an example, the return spring assembly 3 includes a first spring seat 31, a first spring 32, a second spring seat 33, a second spring 34 and a third spring seat 35 which are arranged concentrically; the first spring seat 31 is installed on the pedal arm 2 through a latch, the third spring seat 35 is installed on the pedal base 1 through a latch, specifically installed in a fixing groove 8 formed on the pedal base 1, the second spring seat 33 is arranged between the first spring seat 31 and the third spring seat 35, and then the first end of the first spring 32 is connected to the first spring seat 31, the second end of the first spring 32 is connected to the first end of the second spring seat 33, the first end of the second spring 34 is connected to the second end of the second spring seat 33, and the third spring seat 35 is connected to the first spring seat 31. The second end of the second spring 34 is connected to the third spring seat 35. The elasticity of the first spring 32 and the second spring 34 is used to make the pedal arm 2 rotate counterclockwise around the pedal base 1 to return to its original position, thereby improving the pedal reset performance; the first spring 32 and the second spring 34 are combined in series, with the first spring 32 close to the pedal arm 2 and the second spring 34 close to the pedal base 1, so that the elastic force of the return spring assembly 3 can be divided into two sections. From the force balance, it is known that the force exerted on the two springs is the same as the force exerted on the original spring, that is, the total force, and the total displacement is the superposition of the independent displacements of the two springs. If it is greater than the displacement generated by the original spring, the corresponding stiffness coefficient becomes smaller, which can expand the pedal force range. In this example, the length of the first spring 32 is not equal to the length of the second spring 34. By selecting from the serialized parameters of the first spring 32 and the second spring 34, different pedal force characteristics can be combined to achieve different pedal feel styles.

[0059] In one embodiment, referring to Figure 4 The return spring assembly 3 also includes a spring guide rod 36 and a damping block 37; the spring guide rod 36 is inserted into the first spring 32, the second spring seat 33 and the second spring 34; one end of the spring guide rod 36 is connected to the first spring seat 31 through a damping block 37, and the other end of the spring guide rod 36 is connected to the third spring seat 35 through a damping block 37.

[0060] As an example, the return spring assembly 3 also includes a spring guide rod 36 and a damping block 37; the spring guide rod 36 is inserted into the first spring 32, the second spring seat 33 and the second spring 34; one end of the spring guide rod 36 is connected to the first spring seat 31 through a damping block 37, and the other end of the spring guide rod 36 is connected to the third spring seat 35 through a damping block 37; when the first spring 32 and the second spring 34 are compressed or rebounded, the spring guide rod 36 can provide guidance for them to ensure that the first spring 32 and the second spring 34 are compressed or rebounded and move in the axial direction to avoid deviation; the damping block 37 can cause the first spring 32 and the second spring 34 to produce a force hysteresis effect during the recovery process of the pedal arm 2, thereby realizing the human-machine pedal feel requirement.

[0061] In one embodiment, referring to Figure 5 The pedal control assembly 4 includes a pedal depth sensor 41, a sensor fork 42 and a module body 43; the pedal depth sensor 41 is installed on the pedal base 1, the first end of the sensor fork 42 is rotatably installed on the connecting shaft of the pedal depth sensor 41, and the second end of the sensor fork 42 is connected to the pedal arm 2; the module body 43 is installed on the connecting shaft of the pedal depth sensor 41, is electrically connected to the sensor fork 42, monitors the pedal state, and outputs a pedal braking signal.

[0062] As an example, a pedal control assembly 4 is introduced, which includes a pedal depth sensor 41, a sensor fork 42 and a module body 43; the pedal depth sensor 41 is installed on the pedal base 1, the first end of the sensor fork 42 is rotatably installed on the connecting shaft of the pedal depth sensor 41, and the second end of the sensor fork 42 is connected to the pedal arm 2; when the pedal arm 2 rotates, it can drive the sensor fork 42 to rotate, and the sensor fork 42 rotates, and the module body 43 is installed on the connecting shaft of the pedal depth sensor 41, and is electrically connected to the sensor fork 42 to monitor the pedal state and output the pedal braking signal; the pedal control assembly 4 interacts with other modules through wire control on the basis of transmitting a single mechanical characteristic, and sends a braking demand-related signal to the bus after its own processing and calculation, thereby improving the function and performance of the device and satisfying the user's driving experience.

[0063] In one embodiment, referring to Figure 5 The sensor fork 42 includes an adapter sleeve 421 and two fork arms 422 extending from the adapter sleeve 421 along the same radial direction; the two fork arms 422 cooperate with the adapter sleeve 421 to form a slide groove 44, and the pedal control assembly 4 also includes a fork pin 45; the fork pin 45 is installed in the slide groove 44, one end of the fork pin 45 is fixed on the pedal arm 2, and moves in the slide groove 44 with the rotation of the pedal arm 2.

[0064] As an example, it is introduced that the sensor fork 42 includes an adapter sleeve 421 and two fork arms 422 extending from the adapter sleeve 421 along the same radial direction; the two fork arms 422 cooperate with the adapter sleeve 421 to form a slide groove 44, and the pedal control assembly 4 also includes a fork pin 45, which is installed in the slide groove 44, and one end of the fork pin 45 is fixed on the pedal arm 2. When the pedal arm 2 rotates, the fork pin 45 can be driven to move in the slide groove 44, so that the sensor fork 42 rotates around the connecting axis of the pedal depth sensor 41, and the module body 43 monitors the pedal status by monitoring the rotation angle of the sensor fork 42, and outputs a pedal braking signal.

[0065] In one embodiment, referring to Figure 5The pedal control assembly 4 also includes two Hall sensors and a pedal control unit arranged in the module body 43; the two Hall sensors are arranged side by side and parallel to the axis direction of the connecting shaft of the pedal depth sensor 41, and are used to perform signal verification on the pedal depth sensor 41 and output a voltage signal corresponding to the pedal state; the pedal control unit and the two Hall sensors are used to output a pedal braking signal according to the voltage signal output by the Hall sensor.

[0066] As an example, it is introduced that two Hall sensors and a pedal control unit are provided in the module body 43; wherein, the two Hall sensors are arranged side by side and parallel to the axial direction of the connecting shaft of the pedal depth sensor 41. When the pedal arm 2 rotates, it can drive the fork pin 45 to move in the slide groove 44, so that the sensor fork 42 rotates around the connecting shaft of the pedal depth sensor 41. The pedal depth sensor 41 monitors the rotation angle of the pedal arm 2 through the rotation angle of the sensor fork 42. Under the induction action, the Hall sensor sends out a voltage signal corresponding to the rotation angle of the pedal arm 2. The pedal control unit obtains the signal related to the vehicle's formulation needs after processing and calculation, and sends out a pedal braking signal through the CAN bus. In addition, the module body 43 has an external connector with eight pins, which is connected to the CAN bus through the connector; the two Hall sensors are independent of each other, and the voltage values ​​of the two can be calibrated to a 2:1 relationship through sensor calibration; the two independent Hall sensors (HALL1, HALL2) can each induce a certain voltage (PPS1, PPS2) under the action of a magnetic field, and the voltage value of PPS1 is twice the voltage value of PPS2. The two voltage signals are used for voltage signal verification of the pedal depth sensor 41, so as to improve the reliability and safety level of the pedal depth signal input.

[0067] In one embodiment, referring to Figure 2 and Figure 3 , a plurality of energy absorbing and weight reducing holes 9 are provided on the pedal arm 2.

[0068] As an example, it is introduced that a plurality of energy-absorbing and weight-reducing holes 9 are provided on the pedal arm 2, which improves the strength of the pedal arm 2 while reducing the weight of the pedal arm 2 and lowering the production cost.

[0069] The embodiment of the present invention provides a brake pedal control system, referring to Figure 5 and Figure 6 , including a brake pedal device, an intelligent driving module and a brake control unit;

[0070] The brake pedal device is provided with a pedal control unit for monitoring the pedal status and outputting a pedal brake signal;

[0071] Intelligent driving module, used to output the current driving mode;

[0072] The brake control unit is used to implement wheel-end braking based on the pedal brake signal and the current driving mode.

[0073] As an example, the brake pedal control system includes a brake pedal device, an intelligent driving module and a brake control unit. In conventional travel braking, when the user steps on the brake pedal, the pedal feel of the brake pedal device can be fed back. According to the rotation state of the pedal arm 2, the Hall sensor and the pedal depth sensor 41 send a voltage signal, and the voltage signal is transmitted to the pedal control unit in the brake pedal device. The pedal control unit processes and converts the collected voltage signal into bus signals such as brake pedal state validity, brake pedal state signal, brake pedal depth signal, brake pedal deceleration signal, etc. by using the program algorithm in the pedal control unit to calculate and convert it into a bus signal such as brake pedal state validity, brake pedal state signal, brake pedal depth signal, brake pedal deceleration signal, etc. After calculation and processing by the program algorithm in the brake control unit such as the mapping relationship between the voltage signal and the brake deceleration signal, the brake pedal state validity, pedal state signal (whether it is stepped on), pedal depth signal (stroke percentage), brake request signal (i.e. brake deceleration), etc. are obtained, and these signals are sent through the CAN bus; at the same time, the central controller (Central Control Unit) CCU judges according to the pedal state signal, controls the brake light to light up and turn off, and integrates the brake pedal depth sensor 41 and the brake light switch into the pedal control assembly 4 to reduce the number of parts;

[0074] In addition to conventional travel braking, the bus signal is input into the intelligent driving module to determine whether the current driving state meets the requirements for entering the intelligent driving module. When the vehicle enters the intelligent driving mode (such as cruise driving, intelligent parking, etc.), the pedal control assembly 4 will be taken over by the brake control unit, and the pedal control assembly 4 will no longer send a braking deceleration request signal. Instead, the brake control unit will establish braking pressure and then implement braking after processing the braking requirements of the external module. When the brake pedal is pressed during intelligent driving, the mode is intervened and exited, and the braking request returns to the pedal control module, that is, the driver is responsible for the vehicle braking request.

[0075] In one embodiment, referring to Figure 5 and Figure 6 , a braking control unit is used to implement wheel-end braking and control the operation of the pedal control unit according to the pedal braking signal when the current driving mode is the intelligent driving mode; when the current driving mode is the non-intelligent driving mode, exit the control of the pedal control unit.

[0076] As an example, in actual situations, when the current driving mode of the vehicle is the intelligent driving mode, the brake control unit obtains the brake pressure according to the pedal brake signal and the current driving mode, thereby implementing wheel-end braking, that is, the pedal control assembly 4 will be taken over by the brake control unit, and the pedal control assembly 4 will no longer send a brake deceleration request signal, but the brake control unit will implement braking after establishing the brake pressure according to the braking demand of the external module. When the brake pedal is stepped on during the intelligent driving process, the mode is intervened and exited, and the brake request returns to the pedal control module, that is, the driver is responsible for the vehicle braking request. When the current driving mode of the vehicle is the non-intelligent driving mode, the brake control unit exits the control pedal control unit, and the pedal control unit uses the program algorithm in the pedal control unit to process and calculate the collected voltage signal into bus signals such as brake pedal state validity, brake pedal state signal, brake pedal depth signal, brake pedal deceleration signal, etc. After the program algorithm in the brake control unit such as the mapping relationship between the voltage signal and the brake deceleration signal, the brake pedal state validity, pedal state signal (whether stepped on), pedal depth signal (stroke percentage), brake request signal (i.e. brake deceleration), etc. are obtained, and these signals are sent through the CAN bus.

[0077] An embodiment of the present invention provides an automobile, including a brake pedal control system.

[0078] As an example, the pedal base 1 is used as the installation base of the brake pedal device, and has a mounting bushing, which is installed on the front panel of the vehicle body through a nut. One end of the pedal arm 2 is rotatably installed on the pedal base 1, and the other end is provided with a pedal surface 5. The pedal surface 5 is an appearance component designed according to the front of the shape. Its position and size meet the human-machine requirements. It is also a human-machine operation contact component for driving brake operation. The pedal arm 2 includes a first connecting arm, a second connecting arm extending upward along an arc from one end of the first connecting arm, and a pedal surface 5 fixed on one end of the second connecting arm; one end of the first connecting arm of the pedal arm 2 rotates around the pedal base 1, =. The return spring assembly 3 is installed between the pedal arm 2 and the pedal base 1. When the pedal surface 5 is stepped on, pressure is applied to the pedal arm 2 so that it rotates clockwise around the pedal base 1 to compress the return spring assembly 3. When the pedal arm 2 is released, the pedal arm 2 is not subjected to force. The elasticity of the return spring assembly 3 is utilized to make the pedal arm 2 rotate counterclockwise around the pedal base 1 to return to its original position. The return spring assembly 3 is used to provide a restoring force to the pedal arm 2 and generate a restoring force hysteresis effect to achieve a human-machine pedal feel. The pedal control assembly 4 integrates components such as sensors and a pedal control unit, and is provided with connectors for internal and external communication. It is installed on the pedal base 1 and connected to the pedal arm 2. When the pedal arm 2 rotates, the pedal control assembly 4 can monitor the pedal state and output a pedal braking signal. The pedal base 1, the pedal arm 2, the return spring assembly 3 and the pedal control assembly 4 are arranged in this way to form a wire-controlled brake pedal device. Compared with the existing brake pedal device, the pedal base 1 is no longer restricted by the installation interface (such as a vacuum booster, an EHB body, etc.), and the original mechanical push rod connection is cancelled, which can reduce the size of the pedal, reduce the weight of the entire device, and make the vehicle body layout more flexible. The pedal control assembly 4 interacts with other modules through wire control on the basis of transmitting a single mechanical characteristic, and sends a braking demand-related signal to the bus after its own processing and calculation, thereby improving the function and performance of the device and satisfying the user's driving experience.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A brake pedal device, characterized in that: Includes a pedal base, a pedal arm, a return spring assembly and a pedal control assembly; One end of the pedal arm is rotatably mounted on the pedal base, and the other end is provided with a pedal surface; The return spring assembly is installed between the pedal arm and the pedal base, and is used to drive the pedal arm to rotate around the pedal base; The pedal control assembly is installed on the pedal base and connected to the pedal arm, and is used to monitor the pedal state and output a pedal brake signal.

2. The brake pedal device according to claim 1, characterized in that: The pedal base is provided with a rotating shaft, and one end of the pedal arm is rotatably mounted on the rotating shaft; The brake pedal device also includes a first limit block and a second limit block; The first limit block is arranged on the pedal base at a position close to the rotating shaft, corresponding to one end of the pedal arm; The second limit block is arranged on the pedal base at a position away from the rotation axis and intersects with the projection of the pedal arm on the pedal base; The first limit block cooperates with the second limit block to limit the rotational travel of the pedal arm.

3. The brake pedal device according to claim 2, characterized in that: The second limit block includes a limit block body and two limit walls extending from both side edges of the limit block body in the same direction, the limit block body and the two limit walls cooperate to form a fixing groove, and the second limit block intersects perpendicularly with the projection of the pedal arm on the pedal base; The first end of the return spring assembly is installed in the fixing groove, and the second end of the return spring assembly is connected to the pedal arm.

4. The brake pedal device according to claim 1, characterized in that: The return spring assembly includes a first spring seat, a first spring, a second spring seat, a second spring and a third spring seat which are arranged concentrically; The first spring seat is connected to the pedal arm, the third spring seat is mounted on the pedal base, and the second spring seat is arranged between the first spring seat and the third spring seat; The first end of the first spring is connected to the first spring seat, and the second end of the first spring is connected to the first end of the second spring seat; the first end of the second spring is connected to the second end of the second spring seat, and the second end of the second spring is connected to the third spring seat.

5. The brake pedal device according to claim 4, characterized in that: The return spring assembly also includes a spring guide rod and a damping block; The spring guide rod is inserted into the first spring, the second spring seat and the second spring; One end of the spring guide rod is connected to the first spring seat through the damping block, and the other end of the spring guide rod is connected to the third spring seat through the damping block.

6. The brake pedal device according to claim 1, characterized in that: The pedal control assembly includes a pedal depth sensor, a sensor fork and a module body; The pedal depth sensor is mounted on the pedal base, the first end of the sensor fork is rotatably mounted on the connecting shaft of the pedal depth sensor, and the second end of the sensor fork is connected to the pedal arm; The module body is mounted on the connecting shaft of the pedal depth sensor, is electrically connected to the sensor fork, monitors the pedal state, and outputs a pedal brake signal.

7. The brake pedal device according to claim 6, characterized in that: The sensor shift fork comprises an adapter sleeve and two shift fork arms extending from the adapter sleeve along the same radial direction; The two shift fork arms cooperate with the adapter sleeve to form a slide groove, and the pedal control assembly also includes a shift fork pin; The shift fork pin is installed in the slide groove, one end of the shift fork pin is fixed on the pedal arm, and moves in the slide groove along with the rotation of the pedal arm.

8. The brake pedal device according to claim 6, characterized in that: The pedal control assembly also includes two Hall sensors and a pedal control unit disposed in the module body; The two Hall sensors are arranged side by side and parallel to the axis direction of the connecting shaft of the pedal depth sensor, and are used to perform signal verification on the pedal depth sensor and output a voltage signal corresponding to the pedal state; The pedal control unit and the two Hall sensors are used to output a pedal braking signal according to the voltage signal output by the Hall sensors.

9. The brake pedal device according to claim 1, characterized in that: The pedal arm is provided with a plurality of energy absorbing and weight reducing holes.

10. A brake pedal control system, characterized in that: A brake pedal device, an intelligent driving module and a brake control unit comprising any one of claims 1 to 9; The brake pedal device is provided with a pedal control unit for monitoring the pedal state and outputting a pedal brake signal; The intelligent driving module is used to output the current driving mode; The brake control unit is used to implement wheel-end braking based on the pedal brake signal and the current driving mode.

11. The brake pedal control system according to claim 10, characterized in that: The braking control unit is used to implement wheel-end braking according to the pedal braking signal and control the operation of the pedal control unit when the current driving mode is the intelligent driving mode; and to exit control of the pedal control unit when the current driving mode is the non-intelligent driving mode.

12. A car, characterized in that: Includes the brake pedal control system as described in any one of claims 10-11.

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