Automobile brake-by-wire device

Abstract

An automobile brake-by-wire device belongs to the field of automobile electronic accessories, and is particularly suitable for a new energy automobile and an automatic driving system. An outer brake block, a brake disc, an inner brake block, a pressure sensor and an ejector block are sequentially arranged in the brake caliper body, an actuator is arranged on the brake caliper body, the ejector block is arranged between the actuator and the pressure sensor, and the ejector block and the pressure sensor are arranged in a linkage mode. The controller is electrically connected with the power source, the brake pedal sensor, the actuator and the pressure sensor. According to the device, the effect of the actuator and the clamping force on a brake disc can be accurately kept in a direct proportion relation with signals of a brake pedal sensor, and it is guaranteed that the braking force of all wheels is the same.

Description

Technical Field

[0001] The invention relates to an automobile brake-by-wire device and belongs to the field of automobile electronic accessories. Background Art

[0002] In recent years, with the rapid development of new energy vehicles, wire control braking has gradually become the development direction of new energy vehicle braking systems with its advantages of high integration, light weight, sensitive response, and the ability to match autonomous braking systems and automatic driving systems. Existing wire control braking devices all use controllers to receive brake pedal signals, and actuators drive brake pads to brake the brake discs. This method can only control the actuator stroke, but cannot actually control the amount of clamping force of the brake pads on the brake discs, let alone feedback and adjust the clamping force of the brake pads on the brake discs. After the brake pads are worn, it is difficult to keep the braking force of each wheel consistent. Moreover, the ABS adjustment is based on the maximum brake wheel speed, which causes a serious attenuation of the braking effect and affects driving safety. Therefore, a simple and effective wire control braking device that can feedback the clamping force is needed to solve this problem. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an automobile wire-controlled brake device, which adopts pressure sensor feedback technology, can feedback the braking force on each wheel, and adjust the braking force to keep the braking force of each wheel consistent and ensure the braking effect.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an outer brake block, a brake disc, an inner brake block, a pressure sensor and a top block are sequentially arranged inside a brake caliper body, an actuator is arranged on the brake caliper body, the top block is arranged between the actuator and the pressure sensor, and the top block is arranged in linkage with the pressure sensor. A controller is electrically connected to a power supply, a brake pedal sensor, an actuator and a pressure sensor respectively.

[0005] The brake pedal sensor as described above is a linear sensor and is directly proportional to the pedal movement distance.

[0006] The pressure sensor as described above is a linear sensor, and the pressure magnitude is directly proportional to the output signal.

[0007] The actuator as described above is a motor-driven reduction mechanism and a top block linear motion actuator.

[0008] The controller as described above controls the extension length of the top block of the actuator so that the pressure sensor signal and the brake pedal sensor signal are in direct proportion.

[0009] The beneficial effect of the present invention is that by using the feedback of the pressure sensor, the actuator action and the clamping force on the brake disc can be accurately maintained in a proportional relationship with the brake pedal sensor signal, ensuring the same braking force on each wheel. This structure is sensitive, highly integrated, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0011] Figure 1 The utility model is a schematic diagram of the principle structure of a vehicle wire control brake device.

[0012] In the figure, 1. power supply, 2. pedal sensor, 3. controller, 4. actuator, 5. top block, 6. pressure sensor, 7. inner brake pad, 8. brake caliper body, 9. outer brake pad, 10. brake disc. DETAILED DESCRIPTION

[0013] Since the wire control brake device of this scheme has the same structural principle when braking each wheel of the car, the attached Figure 1 The braking system of only one wheel is described.

[0014] The following is combined with Figure 1 , the scheme of the present invention is further described.

[0015] exist Figure 1 In the embodiment, an outer brake block 9, a brake disc 10, an inner brake block 7, a pressure sensor 6 and a top block 5 are sequentially arranged inside a brake caliper body 8 from outside to inside, an actuator 4 is arranged on the brake caliper body 8, and the top block 5 is arranged between the actuator 4 and the pressure sensor 6, and the top block 5 is arranged in linkage with the pressure sensor 6. A controller 3 is electrically connected to a power source 1, a brake pedal sensor 2, an actuator 4 and a pressure sensor 6, respectively.

[0016] Since the brake pedal sensor 2 as described above is a linear sensor, it is directly proportional to the pedal movement distance.

[0017] Since the pressure sensor 6 as described above is a linear sensor, the pressure magnitude is directly proportional to the output signal.

[0018] Since the actuator 4 as described above is a motor driven speed reduction mechanism, the top block 5 is a linear motion actuator.

[0019] As described above, the controller 3 controls the extension length of the top block 5 of the actuator 4, so that the signal of the pressure sensor 6 and the signal of the brake pedal sensor 2 are in direct proportion.

[0020] When braking, the brake pedal is pressed, and the pedal sensor 2 generates a linear signal to the controller 3. The controller 3 controls the power supply 1 to drive the actuator 4 to work, and the linear motion pushes the top block 5, the pressure sensor 6, and the inner brake block 7, and the outer brake block 9 and the brake caliper body 8 to form a clamping force on the brake disc 10, thereby braking the brake disc 10. The larger the signal of the brake pedal sensor 2, the more the top block 5 extends, the greater the clamping force, the larger the signal of the pressure sensor 6, and the greater the braking force. When the signal of the pressure sensor 6 reaches the braking signal requirement of the pedal sensor 2, the controller 3 cuts off the driving current of the power supply 1 to the actuator 4, so that the braking force is consistent with the braking requirement signal of the pedal sensor 2.

[0021] When the signal of pedal sensor 2 becomes smaller, controller 3 drives actuator 4 to reverse, top block 5 retracts, and the pressure of pressure sensor 6 decreases to keep consistent with the signal requirement of pedal sensor 2.

[0022] During the use of the car, the brake disc 10, the inner brake pad 7 and the outer brake pad 9 will wear out. Because the controller 3 controls the pressure sensor 6 signal and the brake pedal sensor 2 signal to be in direct proportion, the controller 3 controls the actuator 4 to drive the top block 5 to increase the stroke to maintain the required pressure. Therefore, regardless of the amount of wear, the clamping force of each wheel can always be guaranteed to be the same.

[0023] The present invention is also applicable to drum brake devices.

[0024] The technical solution of the present invention is to realize control based on the feedback adjustment of the pressure sensor, which is a new control solution. Any product and technology produced by anyone based on or inspired by this solution shall be protected by the present invention.

Claims

1. A vehicle brake-by-wire device, characterized in that: An outer brake block, a brake disc, an inner brake block, a pressure sensor and a top block are sequentially arranged inside the brake caliper body, an actuator is arranged on the brake caliper body, the top block is arranged between the actuator and the pressure sensor, and the top block is linked to the pressure sensor; a controller is electrically connected to a power supply, a brake pedal sensor, an actuator and a pressure sensor respectively.

2. The automobile brake-by-wire device according to claim 1, characterized in that: The brake pedal sensor is a linear sensor that is directly proportional to the distance the pedal moves.

3. The automobile brake-by-wire device according to claim 1, characterized in that: The pressure sensor is a linear sensor, and the pressure it receives is directly proportional to the output signal.

4. The automobile brake-by-wire device according to claim 1, characterized in that: The actuator is a motor driven reduction mechanism and a top block linear motion actuator.

5. The automobile brake-by-wire device according to claim 1, characterized in that: The controller controls the extension length of the top block of the actuator so that the pressure sensor signal and the brake pedal sensor signal are in direct proportion.

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