Brake fluid backflow prevention device, brake system and motorcycle

Abstract

The invention discloses a brake fluid backflow prevention device, a brake system and a motorcycle, the brake fluid backflow prevention device comprises a brake master cylinder, a backflow pump and brake calipers, an oil outlet of the backflow pump is connected with the brake master cylinder through a first oil way, and the oil outlet of the backflow pump is further connected with the brake calipers through a second oil way; a first normally-open valve is arranged on the first oil way, when the rotating speed of an engine exceeds a preset threshold value, the first normally-open valve is closed to cut off the first oil way, at the moment, brake fluid can be prevented from flowing back from the brake master cylinder, and therefore brake efficiency attenuation caused by abnormal stroke increase of a piston can be prevented; therefore, the timeliness and the reliability of primary braking are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of brake systems, and in particular to a brake fluid backflow prevention device, a brake system and a motorcycle. Background Art

[0002] When it comes to optimizing the safety and performance of motorcycle braking systems, the core control mechanism of ABS (English name: Anti-lock Braking System, abbreviated as ABS, Chinese name: anti-lock braking system) is particularly important.

[0003] The ABS control unit is a highly sophisticated system that integrates an electronic control unit (ECU, English name: Electronic Control Unit) and a hydraulic control unit (HCU, English name: Hydraulic Control Unit). Its working principle is based on the real-time feedback of the wheel speed sensor and analyzes the dynamic state of the wheel through precise algorithms.

[0004] In emergency braking scenarios, when the wheel slip rate rises sharply and approaches the edge of locking, the ECU intervenes immediately and instructs the HCU to adjust the brake cylinder pressure of the hydraulic brake caliper and implement decompression operations to restore the wheel speed and reduce the slip rate, thereby avoiding complete wheel locking and ensuring vehicle stability and controllability during braking. Subsequently, as the slip rate drops below the safety threshold, the system increases pressure again, forming a dynamic "increase pressure-maintain pressure-decompression" cycle, controlling the wheel slip rate in the most optimized way, maximizing the utilization of road adhesion, and achieving safe and efficient braking effects.

[0005] However, for motorcycles, the violent vibrations generated by the engine when running in the high speed range will have an adverse effect on the braking system. This vibration may cause the piston on the brake caliper to return abnormally, the piston stroke to increase abnormally, and then cause abnormal reflux of brake fluid. This reflux phenomenon directly weakens the response ability of the initial braking, and the braking efficiency is significantly reduced due to the increase in the idle stroke in the brake caliper, which seriously threatens driving safety.

[0006] Therefore, how to improve the braking safety of motorcycles is a technical problem that those skilled in the art currently need to solve. Summary of the invention

[0007] The purpose of the present invention is to provide a brake fluid backflow prevention device, a brake system and a motorcycle, which can effectively improve the stability and safety of the motorcycle during braking.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A brake fluid backflow prevention device comprises: a brake master cylinder, a reflux pump and a brake caliper, wherein the oil outlet of the reflux pump is connected to the brake master cylinder through a first oil circuit, and the oil outlet of the reflux pump is also connected to the brake caliper through a second oil circuit, and a first normally open valve is provided on the first oil circuit, and the first normally open valve is used to close when the engine speed exceeds a preset threshold value to cut off the first oil circuit.

[0010] Preferably, a first one-way valve connected in parallel with the first normally open valve is provided on the first oil circuit, and the first one-way valve can allow brake fluid to flow to the brake master cylinder.

[0011] Preferably, the first one-way valve and the first normally open valve are an integrated anti-backflow control valve module.

[0012] Preferably, a second normally open valve is provided on the second oil circuit.

[0013] Preferably, a second one-way valve connected in parallel with the second normally open valve is provided on the second oil circuit.

[0014] Preferably, the oil inlet of the reflux pump is connected to the brake caliper via a third oil circuit, and a normally closed valve is provided on the third oil circuit.

[0015] Preferably, a third one-way valve is provided on the third oil circuit, and the third one-way valve is located between the reflux pump and the normally closed valve.

[0016] Preferably, an accumulator is connected to the third oil circuit.

[0017] A braking system comprises the brake fluid backflow prevention device described in any one of the above items.

[0018] A motorcycle comprises the above-mentioned braking system.

[0019] Compared with the prior art, the above technical solution has the following advantages:

[0020] The present invention provides a brake fluid backflow prevention device, a brake system and a motorcycle, wherein the brake fluid backflow prevention device comprises: a brake master cylinder, a reflux pump and a brake caliper, the oil outlet of the reflux pump is connected to the brake master cylinder through a first oil circuit, the oil outlet of the reflux pump is also connected to the brake caliper through a second oil circuit, a first normally open valve is provided on the first oil circuit, when the engine speed exceeds a preset threshold value, the first normally open valve is closed to cut off the first oil circuit, at which time the brake fluid can be prevented from flowing back from the brake master cylinder, thereby preventing the braking efficiency from being attenuated due to an abnormal increase in the piston stroke, thereby ensuring the timeliness and reliability of the initial braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 The present invention is a schematic diagram of the principle of a brake fluid backflow prevention device provided in a specific embodiment of the present invention.

[0023] The reference numerals are as follows:

[0024] 10-reflux pump, 11-first oil circuit, 111-first normally open valve, 112-first one-way valve, 12-second oil circuit, 121-second normally open valve, 122-second one-way valve, 13-third oil circuit, 131-normally closed valve, 132-third one-way valve;

[0025] 20-brake master cylinder; 30-brake caliper; 40-accumulator; 50-motor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Please refer to Figure 1A brake fluid backflow prevention device provided in an embodiment of the present invention can be applied to a brake system of a motorcycle, wherein the brake fluid backflow prevention device comprises: a brake master cylinder 20, a reflux pump 10 and a brake caliper 30, an oil outlet of the reflux pump 10 is connected to the brake master cylinder 20 through a first oil circuit 11, and the oil outlet of the reflux pump 10 is also connected to the brake caliper 30 through a second oil circuit 12, a first normally open valve 111 is provided on the first oil circuit 11, when the engine speed exceeds a preset threshold value, the first normally open valve 111 is closed to cut off the first oil circuit 11, at which time the brake fluid can be prevented from flowing back from the brake master cylinder 20, thereby preventing the braking performance from being attenuated due to an abnormal increase in the piston stroke, thereby ensuring the timeliness and reliability of the initial braking. The speed sensor can be used to obtain the engine speed data in real time. When the speed rises to a preset threshold, indicating that the engine vibration will be significantly enhanced and may have an adverse effect on the braking system, the ECU will promptly receive the detection data from the speed sensor and respond quickly. After judgment, the first normally open valve 111 is controlled to close quickly to cut off the reflux path of the brake fluid under extreme vibration conditions. When the driver performs the braking operation, the brake signal is accurately captured and transmitted to the ECU. The ECU randomly performs complex logical judgments. Under the premise of ensuring safety, the first normally open valve 111 is controlled to open in real time to restore the normal flow path of the brake fluid to ensure that the braking system can respond quickly and accurately to the driver's operating intention, thereby achieving a safe and efficient braking effect.

[0028] In some embodiments, the first oil circuit 11 is provided with a first one-way valve 112 connected in parallel with the first normally open valve 111, and the first one-way valve 112 can allow the brake fluid to flow to the brake master cylinder 20. The first one-way valve 112 and the first normally open valve 111 constitute a double protection mechanism, which can enhance the fault tolerance of the brake system, and can effectively prevent the brake fluid from flowing back even in the event of a failure of the electronic control unit, thereby avoiding the problem of brake failure. Among them, the first one-way valve 112 and the first normally open valve 111 are an integrated anti-backflow control valve module to improve the convenience of installation.

[0029] In some embodiments, Figure 1As shown, the second oil circuit 12 is provided with a second normally open valve 121, and the second oil circuit 12 is provided with a second check valve 122 connected in parallel with the second normally open valve 121. The second check valve 122 and the second normally open valve 121 can be integrated into a module for easy installation. Further, the oil inlet of the reflux pump 10 is connected to the brake caliper 30 through the third oil circuit 13, and the third oil circuit 13 is provided with a normally closed valve 131. The third oil circuit 13 is also provided with a third check valve 132, and the third check valve 132 is located between the reflux pump 10 and the normally closed valve 131. In addition, a check valve is also provided on the oil circuit of the oil outlet of the reflux pump 10 to prevent the brake fluid from flowing back from the oil outlet to the reflux pump 10. Further, the third oil circuit 13 is connected with an accumulator 40, and the accumulator 40 can supply oil to the reflux pump 10 through the third check valve 132, and can also supply oil to the brake caliper 30 when the normally closed valve 131 is opened.

[0030] The embodiment of the present invention further provides a braking system, including the brake fluid backflow prevention device provided by any of the above embodiments. The beneficial effects of the braking system can be referred to the above brake fluid backflow prevention device, which will not be repeated here. The braking system includes two sets of brake fluid backflow prevention devices to adapt to the braking of the front and rear wheels of the motorcycle, and the backflow pumps 10 of the two sets of brake fluid backflow prevention devices can be driven by the same motor 50.

[0031] In addition to the first normally open valve 111 and the first one-way valve 112, the braking system provided in the embodiment of the present invention is also equipped with other devices to perform the ABS anti-lock function. These devices include wheel speed sensors, ABS control modules, and solenoid valves distributed in the front and rear wheel brake systems. The wheel speed sensor monitors the wheel speed in real time and transmits the signal to the ABS control module. The ABS control module calculates the slip rate based on parameters such as vehicle speed and wheel speed, and adjusts the brake oil pressure by controlling the opening and closing of the solenoid valve, so that the wheel maintains an appropriate slip rate during the braking process and does not lock. This can not only ensure the stability of the motorcycle during emergency braking, but also shorten the braking distance and improve the braking efficiency.

[0032] An embodiment of the present invention further provides a motorcycle, comprising the brake system provided by the above embodiment. The beneficial effects of the motorcycle may be referred to the above brake fluid backflow prevention device, which will not be described in detail here.

[0033] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0034] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0035] The above is a detailed introduction to a brake fluid backflow prevention device, a brake system and a motorcycle provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A brake fluid backflow prevention device, characterized in that: include: A brake master cylinder (20), a reflux pump (10) and a brake caliper (30), wherein the oil outlet of the reflux pump (10) is connected to the brake master cylinder (20) via a first oil circuit (11), and the oil outlet of the reflux pump (10) is also connected to the brake caliper (30) via a second oil circuit (12), and a first normally open valve (111) is provided on the first oil circuit (11), and the first normally open valve (111) is used to close when the engine speed exceeds a preset threshold value, so as to cut off the first oil circuit (11).

2. The brake fluid backflow prevention device according to claim 1, characterized in that: The first oil circuit (11) is provided with a first one-way valve (112) connected in parallel with the first normally open valve (111), and the first one-way valve (112) can allow brake fluid to flow to the brake master cylinder (20).

3. The brake fluid backflow prevention device according to claim 2, characterized in that: The first one-way valve (112) and the first normally open valve (111) are an integrated anti-backflow control valve module.

4. The brake fluid backflow prevention device according to claim 3, characterized in that: A second normally open valve (121) is provided on the second oil circuit (12).

5. The brake fluid backflow prevention device according to claim 4, characterized in that: The second oil circuit (12) is provided with a second one-way valve (122) connected in parallel with the second normally open valve (121).

6. The brake fluid backflow prevention device according to claim 5, characterized in that: The oil inlet of the reflux pump (10) is connected to the brake caliper (30) via a third oil circuit (13), and a normally closed valve (131) is provided on the third oil circuit (13).

7. The brake fluid backflow prevention device according to claim 6, characterized in that: A third one-way valve (132) is provided on the third oil circuit (13), and the third one-way valve (132) is located between the reflux pump (10) and the normally closed valve (131).

8. The brake fluid backflow prevention device according to claim 7, characterized in that: The third oil circuit (13) is connected to an accumulator (40).

9. A braking system, characterized in that: The brake fluid backflow prevention device comprises the brake fluid backflow prevention device according to any one of claims 1 to 8.

10. A motorcycle, characterized in that: Includes the braking system as claimed in claim 9.

Images