Intelligent brake-by-wire system for two-wheeled vehicle

Abstract

The invention relates to the technical field of braking of two-wheeled vehicles, and discloses an intelligent brake-by-wire system for a two-wheeled vehicle. The intelligent brake-by-wire system comprises a manual brake mechanism assembly, a brake-by-wire main cylinder assembly and a brake caliper brake disc assembly, wherein the brake-by-wire main cylinder assembly comprises a first pressure sensor, a piston, a cylinder body, an oil can, a second pressure sensor, a cylinder body rear cover, a controller, a transmission mechanism, a motor rotor, a motor stator, a cylinder body front cover and a spherical hinge; the anti-locking problem of the two-wheeled vehicle in the braking process is solved, and the driving safety coefficient is increased. Part of additional braking functions including active braking, ramp assisting and the like can be achieved through active pressurization.

Description

Technical Field

[0001] The present invention relates to the technical field of two-wheel vehicle braking, and particularly to an intelligent wire control braking system for two-wheel vehicles. Background Art

[0002] Most of the existing braking devices on two-wheel vehicles do not have an anti-lock function. When the driver is in an emergency braking condition, the wheels are prone to lock, resulting in vehicle skidding and affecting driving safety. Even on some high-end two-wheel vehicles, although the braking device has an anti-lock function, it is only a further extension based on the anti-lock function, such as functions like vehicle stop self-locking. The function of intelligent wire control braking cannot be realized, active braking cannot be performed, and ramp assist cannot be achieved. Therefore, the active safety of the vehicle is difficult to guarantee. Although wire control technology has been applied in automobiles, it is rarely applied in two-wheel vehicles due to cost and space problems. Therefore, there is an urgent need in the market for products with low cost and small size to be applied to two-wheel vehicles. Summary of the Invention

[0003] In order to overcome the above deficiencies of the prior art, the present invention provides an intelligent wire control braking system for two-wheel vehicles.

[0004] The technical solution adopted by the present invention is: an intelligent wire control braking system for two-wheel vehicles, including a manual brake mechanism assembly, a wire control master cylinder assembly, and a brake caliper brake disc assembly. The wire control master cylinder assembly includes a first pressure sensor, a piston, a cylinder block, an oil pot, a second pressure sensor, a cylinder block rear cover, a controller, a transmission mechanism, a motor rotor, a motor stator, a cylinder block front cover, and a spherical hinge. The manual brake mechanism assembly is located on the side of the wire control master cylinder assembly close to the motor. The cylinder block front cover, which is the closest to the manual brake mechanism assembly in the wire control master cylinder assembly, is in a tight fit connection with the inner diameter of the cylinder block. The motor stator and the motor rotor are close to the cylinder block front cover. The motor stator is in a tight fit with the cylinder block. The motor rotor is coaxial with the motor stator and their end faces are flush. The motor rotor is positioned by two bearings located in the middle of the cylinder block front cover and the cylinder block. The transmission mechanism is located in the middle of the cylinder block. The part of the transmission mechanism close to the motor output end is connected to the motor rotor output end, and the other end is connected to the ring part of the piston. The piston is located on the side of the cylinder block close to the cylinder block rear cover. The ring part of the piston is in a sealed connection with the inner diameter of the cylinder block through a sealing ring. The rod part of the piston passes through the hollow shaft of the motor rotor and is connected to the brake lever of the manual brake mechanism assembly through a spherical hinge. The oil pot is connected to the cylinder block and is located at the bottom of the piston ring. The second pressure sensor is connected to the cylinder block and is located close to the cylinder block rear cover. The cylinder block rear cover is located on the other side of the cylinder block relative to the cylinder block front cover and is in a sealed connection with the cylinder block.

[0005] Compared with the prior art, the beneficial effects of the present invention are: 1) It has an anti-lock braking function; 2) It can achieve active braking, providing the possibility for realizing adaptive cruise and hill-start assist; 3) It can monitor whether there is leakage in the hydraulic oil circuit: during braking, the sensor will monitor the oil pressure at the corresponding position of the piston and feedback it to the controller. The controller will make a judgment based on the standard value and give a warning prompt. Description of the Drawings

[0006] Figure 1 It is a schematic diagram of the intelligent wire-controlled braking system for two-wheel vehicles according to the present invention; Wherein: brake handle 1, first pressure sensor 2, connecting rod 3, cylinder block 4, oil pot 5, piston 6, second pressure sensor 7, cylinder block rear cover 8, controller 9, caliper 10, wheel speed sensor 11, brake disc 12, transmission mechanism 13, motor rotor 14, motor stator 15, cylinder block front cover 16, spherical hinge 17, handlebar 18. Embodiment

[0007] The intelligent wire-controlled braking system for two-wheel vehicles provided by the present invention can achieve active control of braking, solve the phenomenon of wheel locking during braking of two-wheel vehicles, and increase the driving safety factor. The present invention will be further described below with reference to the drawings.

[0008] As Figure 1 shown, the intelligent wire-controlled braking system for two-wheel vehicles includes a manual braking mechanism assembly, a wire-controlled master cylinder assembly, and a brake caliper-disc assembly. Among them, the wire-controlled master cylinder assembly includes: first pressure sensor 2, piston 6, cylinder block 4, oil pot 5, second pressure sensor 7, cylinder block rear cover 8, controller 9, transmission mechanism 13, motor rotor 14, motor stator 15, cylinder block front cover 16, spherical hinge 17. The manual braking assembly includes: handlebar 18 and a brake handle 1 fixed on the handlebar 18. The main function is that the manual braking assembly is connected to the piston 6 on the wire-controlled master cylinder assembly through the brake handle 1 to transmit the manual braking force to the piston 6; the brake caliper-disc assembly includes: caliper 10, wheel speed sensor 11, brake disc 12.

[0009] According to the actual working conditions, the working of the intelligent wire-controlled braking system for two-wheel vehicles is divided into four situations: 1) Normal deceleration In this working condition, the driver squeezes the brake handle 1. The first pressure sensor 2 detects the driver's intention to brake urgently and feedbacks it to the controller. At this time, the controller does not output a command to make the motor work. The braking force is directly transmitted from the brake handle 1 to the piston rod. The piston rod moves towards the bottom of the cylinder to increase the pressure and transmits the oil pressure to the brake caliper-disc assembly through the pipeline for deceleration. The oil pressure mainly uses the oil pressure generated by the driver squeezing the brake handle 1 to push the piston 6 to push the caliper 10 for braking. At this time, the motor will not work.

[0010] 2) Emergency braking Under this working condition, when the driver encounters an emergency and fully squeezes the brake handle 1, the first pressure sensor 2 detects the driver's intention of emergency braking and feeds it back to the controller. The controller 9 will output a command to make the motor quickly intervene to make the motor work, and adjust the oil pressure by reversing according to the signal fed back to the controller by the wheel speed sensor 11. When the wheel speed sensor 11 detects that the wheel hub is about to be locked, the motor drives the piston to move in the direction of increasing the volume of the master cylinder chamber. Conversely, the motor drives the piston to move in the direction of reducing the volume of the master cylinder. This process repeats until the vehicle stops smoothly.

[0011] 3) Active braking If the vehicle is equipped with a ranging sensor, this technical solution can cooperate with the ranging sensor for active braking. The specific working principle is that when the distance between the ranging sensor and the vehicle in front is too close, the signal is fed back to the controller, and the controller will control the motor to perform active braking.

[0012] 4) Braking standby After braking is completed, the second pressure sensor 7 will feed back the piston 6 position signal to the controller 9. The controller 9 controls the motor to drive the piston back to the original position through the transmission mechanism 13 to standby for subsequent braking pressure regulation.

Claims

1. An intelligent wire control braking system for two-wheel vehicles, comprising a manual braking mechanism assembly, a wire control master cylinder assembly, and a brake caliper brake disc assembly. It is characterized in that: The wire control master cylinder assembly includes a first pressure sensor, a piston, a cylinder block, an oil pot, a second pressure sensor, a cylinder block rear cover, a controller, a transmission mechanism, a motor rotor, a motor stator, a cylinder block front cover, and a spherical hinge; the manual braking mechanism assembly is located on the side of the wire control master cylinder assembly close to the motor; the cylinder block front cover, which is the closest to the manual braking mechanism assembly in the wire control master cylinder assembly, is in a tight fit connection with the inner diameter of the cylinder block; the motor stator and the motor rotor are close to the cylinder block front cover, the motor stator is in a tight fit with the cylinder block, the motor rotor is coaxial with the motor stator and their end faces are flush, and the motor rotor is positioned by two bearings located in the middle of the cylinder block front cover and the cylinder block; the transmission mechanism is located in the middle of the cylinder block, the part of the transmission mechanism close to the motor output end is connected to the motor rotor output end, and the other end is connected to the ring part of the piston; the piston is located on the side of the cylinder block close to the cylinder block rear cover, the ring part of the piston is in a sealed connection with the inner diameter of the cylinder block through a sealing ring, the rod part of the piston passes through the hollow shaft of the motor rotor and is connected to the brake lever of the manual braking mechanism assembly through a spherical hinge; the oil pot is connected to the cylinder block and is located at the bottom of the piston ring; the second pressure sensor is connected to the cylinder block and is located close to the cylinder block rear cover. The cylinder block rear cover is located on the other side of the cylinder block relative to the cylinder block front cover and is in a sealed connection with the cylinder block.

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