Brake pedal simulator and brake-by-wire pedal

Abstract

A brake pedal simulator comprises a sensor (10), an electric control unit (20), a piston assembly (30) and an electromagnetic assembly (40). The sensor is arranged on the brake pedal and collects stroke information. The electric control unit is connected with the sensor to receive the stroke information and generate a driving signal. The piston assembly includes a push rod (32) and a piston barrel (36). The push rod is connected with the brake pedal and movably inserted into the piston cylinder. The electromagnetic assembly includes a permanent magnet (42), a coil (44), and a power module (46). The permanent magnet is connected with the push rod and controlled by the push rod to move. The coil sleeves one end, away from the push rod, of the piston cylinder. And the power module is in signal connection with the electric control unit and is electrically connected with the coil. Stroke information of the brake pedal is collected through the sensor, the stroke information is processed through the electric control unit, and the magnetic field intensity generated by the coil is synchronously controlled through the power module, so that different pedal force feedbacks are provided, better driving experience is brought, and the structure is simple.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, in particular to a brake pedal simulator and a brake pedal comprising the same. Background Art

[0002] The brake pedal is the control unit of the car's brakes, and the feedback force of the pedal can be clearly felt subjectively during the driving process. The brake-by-wire system completely abandons the brake fluid and hydraulic pipelines of the traditional brake system. The braking force is generated by the motor drive, and an electronic mechanical brake that can work independently is installed on each wheel. At this time, the brake pedal is just a sensor that converts human braking action into a signal. However, people's driving habits require the brake pedal to give people a certain pedal force feedback according to different braking depths. At present, the brake pedal itself cannot achieve the feedback of the brake pedal force that is more in line with human feelings during braking. Utility Model Content

[0003] The utility model aims to provide a brake pedal simulator, which can identify the driver's braking action and provide pedal force feedback and has a simple structure.

[0004] Another object of the utility model is to provide a brake pedal, whose brake pedal simulator can identify the driver's braking action and provide pedal force feedback.

[0005] The brake pedal simulator provided by the utility model comprises a sensor, an electronic control unit, a piston assembly and an electromagnetic assembly. The sensor is arranged on the brake pedal and is configured to collect the travel information of the brake pedal. The electronic control unit is connected to the sensor by signal to receive the travel information, and the electronic control unit calculates the travel information and generates a driving signal. The piston assembly comprises a push rod and a piston cylinder. The push rod is connected to the brake pedal and can be movably plugged into the piston cylinder. The electromagnetic assembly comprises a permanent magnet, a coil and a power module. The permanent magnet is movably arranged in the piston cylinder, and the permanent magnet is connected to the push rod and is controlled by the push rod to move along the length direction of the piston cylinder. The coil is sleeved on one end of the piston cylinder away from the push rod, and the length of the coil is less than the length of the piston cylinder. The power module is connected to the electronic control unit signal to receive the driving signal, and the power module is electrically connected to the coil. When the brake pedal is braked, the brake pedal pushes the push rod to move in a braking direction, and the braking direction is parallel to the length direction of the piston cylinder. At this time, the coil generates a magnetic field that repels the permanent magnet after being energized by the power module to provide a feedback force opposite to the braking direction. At the same time, the power module controls the current according to the received driving signal to change the feedback force.

[0006] The brake pedal simulator provided by the utility model collects the travel information of the brake pedal through a sensor, utilizes the electronic control unit to process the travel information and synchronously controls the magnetic field strength generated by the coil through a power module, so as to provide different pedal force feedback, bring a better driving experience, and has a simple structure and is easy to maintain.

[0007] In another exemplary embodiment of the brake pedal simulator, the brake pedal simulator further comprises a first return spring. The first return spring is arranged in the piston cylinder and located at the coil. Two ends of the first return spring abut against the permanent magnet and the inner wall of the piston cylinder respectively.

[0008] In another exemplary embodiment of the brake pedal simulator, the piston assembly further includes a piston and a second return spring. The piston is movably disposed in the piston cylinder along the braking direction and the reverse direction. The push rod is connected to the piston. The second return spring is disposed in the piston cylinder. Two ends of the second return spring abut against the piston and the permanent magnet, respectively.

[0009] In another exemplary embodiment of the brake pedal simulator, the piston assembly further comprises a limiting ring, which is sleeved on the end of the piston cylinder away from the coil, and the push rod passes through the limiting ring and is connected to the piston.

[0010] In another exemplary embodiment of the brake pedal simulator, the electromagnetic assembly further comprises a fixing block, which is movably disposed on the piston cylinder and connected to the permanent magnet to fix the permanent magnet.

[0011] In another exemplary embodiment of the brake pedal simulator, the piston assembly further includes two buffers. One buffer is disposed at the end of the piston cylinder at the push rod and is attached to the inner wall of the piston cylinder. The other buffer is fixedly connected to the fixing block.

[0012] In another exemplary embodiment of the brake pedal simulator, the brake pedal simulator further comprises a base, which is arranged at the end of the piston cylinder away from the push rod, and the first return spring abuts against the base.

[0013] The utility model also provides a brake pedal, which includes a brake pedal simulator, a pedal seat and a pedal arm. The pedal seat is arranged on the instrument pipe beam. The pedal arm is rotatably arranged on the pedal seat. The pedal arm is connected to the push rod. The sensor is arranged on the pedal arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following drawings are only used to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0015] Figure 1 The figure is a schematic structural diagram of a schematic implementation of a brake pedal simulator.

[0016] Figure 2 for Figure 1 A cross-sectional view of the brake pedal simulator is shown.

[0017] Figure 3 A flow chart of an exemplary embodiment of signal control of a brake pedal simulator.

[0018] Figure 4 The figure is a schematic structural diagram of a schematic implementation of a brake pedal.

[0019] Description of symbols

[0020] 10 Sensors

[0021] 20 Electronic Control Unit

[0022] 30 Piston assembly

[0023] 31 Limiting ring

[0024] 32 Putter

[0025] 33 Buffer

[0026] 34 Piston

[0027] 36 Piston Cylinder

[0028] 38 Second return spring

[0029] 40 Electromagnetic components

[0030] 42 permanent magnet

[0031] 44 Coil

[0032] 46 Power Module

[0033] 48 Fixed block

[0034] 50 First return spring

[0035] 60 Base

[0036] 100 Pedal seat

[0037] 200 Pedal Arm

[0038] F Braking direction. DETAILED DESCRIPTION

[0039] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0040] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0041] Figure 1 The figure is a schematic structural diagram of a schematic implementation of a brake pedal simulator. Figure 4 FIG. 1 is a schematic diagram of a brake pedal. The brake pedal simulator is a part of the brake pedal and is used to generate a corresponding pedal feedback force when the brake pedal is braking. Figure 1 and Figure 4 As shown, the brake pedal simulator includes a sensor 10, an electronic control unit 20, a piston assembly 30 and an electromagnetic assembly 40. When the brake pedal is applied, the piston assembly 30 is forced to move in the braking direction F. At this time, the electromagnetic assembly 40 located at the rear end of the piston assembly 30 can provide a feedback force opposite to the braking direction F. At the same time, the sensor 10 collects the relevant travel information of the brake pedal and transmits it to the electronic control unit 20. The electronic control unit 20 calculates the travel information and generates a drive signal to transmit to the electromagnetic assembly 40, thereby controlling the magnetic field strength generated by the electromagnetic assembly 40 to change the magnitude of the feedback force, thereby making the feedback of the pedal diversified and bringing a better driving experience to the driver.

[0042] like Figure 4 As shown, the sensor 10 is disposed on the brake pedal so as to monitor the brake pedal more accurately. The sensor 10 is configured to collect the travel information of the brake pedal, specifically, the travel information includes the displacement of the brake pedal in the braking direction during braking, and the time required to complete the displacement (i.e., equivalent to collecting the force applied to the brake pedal). Figure 3 FIG. 4 is a flow chart of an exemplary implementation of signal control of a brake pedal simulator. Figure 3 and Figure 4As shown, the electronic control unit 20 is connected to the sensor 10 to receive the travel information. Specifically, the electronic control unit 20 is an ECU module, but not limited thereto. The electronic control unit 20 calculates the travel information and generates a driving signal. In this exemplary embodiment, different driving modes (such as general mode, off-road mode and light mode) are also stored in the electronic control unit 20, and each driving mode corresponds to a driving signal. The electronic control unit 20 transmits the corresponding driving signal to the electromagnetic component 40 according to the driver's selection, and controls the electromagnetic component 40 to generate an initial magnetic field strength. When the driver drives in the selected driving mode and brakes, the electromagnetic component 40 will repel the feedback force of the brake pedal based on the above initial magnetic field strength. Among them, each driving mode corresponds to a corresponding initial magnetic field strength, and the various driving modes of the vehicle are matched by calibrating a variety of pedal feelings (pedal feedback forces), thereby giving users a better driving experience.

[0043] Figure 2 for Figure 1 A cross-sectional view of a brake pedal simulator is shown in FIG. Figure 2 As shown, the piston assembly 30 includes a push rod 32 and a piston cylinder 36. The push rod 32 is connected to the brake pedal and is driven by the brake pedal to be movably inserted into the piston cylinder 36 along the braking direction F.

[0044] The electromagnetic assembly 40 includes a permanent magnet 42, a coil 44 and a power module 46. The permanent magnet 42 is movably disposed in the piston cylinder 36. Figure 2 As shown, the electromagnetic assembly 40 further includes a fixing block 48. The fixing block 48 is movably disposed on the piston cylinder 36 along the braking direction F. Specifically, in this exemplary embodiment, the permanent magnet 42 is formed by merging two magnets, which are connected and fixed by the fixing block 48 to prevent the two magnets from falling off and ensure structural stability.

[0045] The permanent magnet 42 is connected to the push rod 32 and is controlled by the push rod 32 to move along the length direction of the piston cylinder 36. The coil 44 is sleeved on one end of the piston cylinder 36 away from the push rod 32. Figure 1 As shown, the length of the coil 44 is less than the length of the piston cylinder 36 to ensure that the electromagnetic assembly 40 does not affect the normal braking stroke of the brake pedal while generating a magnetic field. The power module 46 is connected to the electronic control unit 20 to receive a drive signal. The power module 46 is electrically connected to the coil 44. In this exemplary embodiment, a separate power module 46 is used to ensure the stability of the overall braking system. However, it is not limited to this. In another exemplary embodiment, the coil 44 can also be directly connected to the vehicle power supply.

[0046] like Figure 2 and Figure 3As shown, when the brake pedal is applied, the brake pedal pushes the push rod 32 to move in a braking direction F. In this exemplary embodiment, the braking direction F is parallel to the length direction of the piston cylinder 36. At this time, the coil 44 generates a magnetic field that repels the permanent magnet 42 after being energized by the power module 46, so as to provide a feedback force opposite to the braking direction F. At the same time, the power module 46 controls the current size according to the received drive signal to change the feedback force, thereby making the feedback of the pedal more diversified.

[0047] The travel information of the brake pedal is collected by the sensor 10, and the travel information is processed by the electronic control unit 20 and the magnetic field strength generated by the coil 44 is synchronously controlled by the power module 46, so as to provide different pedal force feedback and bring a better driving experience.

[0048] like Figure 2 As shown, in this exemplary embodiment, the brake pedal simulator further includes a first return spring 50 and a base 60. The first return spring 50 is disposed in the piston cylinder 36 and is located at the coil 44. The base 60 is disposed at the end of the piston cylinder 36 away from the push rod 32. The two ends of the first return spring 50 abut against the permanent magnet 42 and the base 60, respectively, so that the brake pedal can be reset in time when the brake pedal is canceled.

[0049] like Figure 2 As shown, the piston assembly 30 further includes a piston 34 and a second return spring 38. The piston 34 is movably disposed in the piston cylinder 36 along the braking direction F and the opposite direction thereof, and the push rod 32 is connected to the piston 34. Specifically, when the brake pedal is applied, the brake pedal drives the push rod 32 along the braking direction F, and at the same time drives the piston 34 to move in the piston cylinder 36 along the braking direction F. The second return spring 38 is disposed in the piston cylinder 36, and the two ends of the second return spring 38 abut against the piston 34 and the permanent magnet 42, respectively, so that the push rod 32 and the piston 34 can be reset in time when the brake pedal is released, and also makes the brake pedal more linear during braking.

[0050] like Figure 2 As shown, in this exemplary embodiment, the piston assembly 30 further includes a stop ring 31 and two buffers 33. The stop ring 31 is sleeved on the end of the piston cylinder 36 away from the coil 44, and the push rod 32 is passed through the stop ring 31 to connect the piston 34, thereby preventing the piston 34 from falling off. One of the two buffers 33 is arranged on the end of the piston cylinder 36 located at the push rod 32 and fits the inner wall of the piston cylinder 36, and the other buffer 33 is fixedly connected to the fixing block 48, so that the brake pedal can have good buffering during emergency braking to ensure the stability of the brake pedal.

[0051] The utility model also provides a wire-controlled brake pedal. Figure 4As shown, in the exemplary embodiment, the brake-by-wire pedal includes a brake pedal simulator, a pedal seat 100 and a pedal arm 200. The pedal seat 100 is disposed on the instrument tube beam. The pedal arm 200 is rotatably disposed on the pedal seat 100, the pedal arm 200 is connected to the push rod 32, and the sensor 10 is disposed on the pedal arm 200, so as to more accurately monitor the travel information of the brake pedal.

[0052] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0053] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present utility model. They are not intended to limit the scope of protection of the present utility model. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present utility model, such as combination, division or repetition of features, should be included in the scope of protection of the present utility model.

Claims

1. A brake pedal simulator, characterized in that: It can provide feedback force when the brake pedal is braked. The brake pedal simulator includes: a sensor (10) disposed on the brake pedal, the sensor (10) being configured to collect travel information of the brake pedal; an electronic control unit (20), whose signal is connected to the sensor (10) to receive the travel information, and the electronic control unit (20) calculates the travel information and generates a driving signal; A piston assembly (30) comprising a push rod (32) and a piston cylinder (36), wherein the push rod (32) is connected to the brake pedal and is movably inserted into the piston cylinder (36); and An electromagnetic assembly (40) comprising: a permanent magnet (42) movably disposed in the piston cylinder (36), wherein the permanent magnet (42) is connected to the push rod (32) and is controlled by the push rod (32) to move along the length direction of the piston cylinder (36); a coil (44) sleeved on one end of the piston cylinder (36) away from the push rod (32), wherein the length of the coil (44) is shorter than the length of the piston cylinder (36); and a power module (46) which is signal-connected to the electric control unit (20) to receive the drive signal, the power module (46) being electrically connected to the coil (44), When the brake pedal is applied, the brake pedal pushes the push rod (32) to move in a braking direction (F), and the braking direction (F) is parallel to the length direction of the piston cylinder (36). At this time, the coil (44) is energized via the power module (46) to generate a magnetic field that repels the permanent magnet (42) to provide the feedback force opposite to the braking direction (F). At the same time, the power module (46) controls the current size according to the received drive signal to change the feedback force.

2. The brake pedal simulator according to claim 1, characterized in that The brake pedal simulator further comprises a first return spring (50), which is arranged in the piston cylinder (36) and located at the coil (44), and the two ends of the first return spring (50) respectively abut against the permanent magnet (42) and the inner wall of the piston cylinder (36).

3. The brake pedal simulator according to claim 1, characterized in that: The piston assembly (30) further comprises: a piston (34) movably disposed in the piston cylinder (36) along the braking direction (F) and the opposite direction, and the push rod (32) is connected to the piston (34); and A second return spring (38) is arranged on the piston cylinder (36), and two ends of the second return spring (38) respectively abut against the piston (34) and the permanent magnet (42).

4. The brake pedal simulator according to claim 3, characterized in that The piston assembly (30) further comprises a limiting ring (31), wherein the limiting ring (31) is sleeved on an end of the piston cylinder (36) away from the coil (44), and the push rod (32) passes through the limiting ring (31) and is connected to the piston (34).

5. The brake pedal simulator according to claim 1, characterized in that The electromagnetic assembly (40) further comprises a fixing block (48) which is movably disposed on the piston cylinder (36), and the fixing block (48) is connected to the permanent magnet (42) to fix the permanent magnet (42).

6. The brake pedal simulator according to claim 5, characterized in that The piston assembly (30) further comprises two buffer components (33), one of the buffer components (33) being arranged on the piston cylinder (36) at the end of the push rod (32) and being in contact with the inner wall of the piston cylinder (36), and the other of the buffer components (33) being fixedly connected to the fixing block (48).

7. The brake pedal simulator according to claim 2, characterized in that: The brake pedal simulator further comprises a base (60) which is arranged at the end of the piston cylinder (36) away from the push rod (32), and the first return spring (50) abuts against the base (60).

8. A brake-by-wire pedal, characterized in that: include: A brake pedal simulator as claimed in any one of claims 1 to 7; A pedal seat (100) is arranged on the instrument tube beam; as well as A pedal arm (200) is rotatably arranged on the pedal seat (100), the pedal arm (200) is connected to the push rod (32), and the sensor (10) is arranged on the pedal arm (200).

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