An electronic power-assisted brake with ABS function

Abstract

The present invention relates to the technical field of electronic power-assisted brakes, and in particular to an electronic power-assisted brake with ABS function, which comprises a first oil cylinder, a second oil cylinder, a swing rod, an ABS motor, a power-assisted motor, a main push rod and a secondary push rod, the power-assisted motor drives the main push rod to reciprocate horizontally, the rear end of the main push rod is hinged with a pedal, and the front end is connected to the swing rod, the ABS motor drives the secondary push rod to reciprocate horizontally and the front end of the secondary push rod is connected to the end of the swing rod, the first oil cylinder is connected to the second oil cylinder in parallel, and the piston rod ends of the first oil cylinder and the second oil cylinder are respectively connected to the swing rod, and the connection points of the piston rods of the first oil cylinder and the second oil cylinder and the swing rod are respectively located on both sides of the connection point between the main push rod and the swing rod. The device provided by the present invention has a simple structure, has an ABS function, reduces the cost of the brake system and takes into account the safety performance of the brake system.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic power-assisted brakes, and in particular to an electronic power-assisted brake with ABS function. Background Art

[0002] Power-assisted brakes are a key safety component in the automotive chassis domain. How to enhance brake safety has always been the focus of automotive parts, and vacuum booster + ABS, vacuum booster + ESP, electronic power-assisted brakes + ABS / ESP and other solutions have emerged. However, how to balance cost and safety is the difficulty in the development of electronic power-assisted brakes.

[0003] In the prior art, ABS (ESP body stability system also has ABS function) is used to prevent wheel lock. When the wheel locks, ABS or ESP can achieve anti-lock by independently controlling the brake pressure of the four wheels. However, ABS needs to independently control the pressure of the four wheels, and two solenoid valves need to be set for each wheel, which requires a total of 8 solenoid valves and a pump, which greatly increases the cost. Whether it is vacuum or electronic power-assisted brakes, currently only power-assisted brakes are provided to reduce the foot force required for braking, and most current boosters adopt a tandem two-cylinder design, such as the attached Figure 2 As shown, the pressure of the two cylinders in series is the same. The power-assisted brake alone cannot provide the ABS function. It can only provide power-assisted braking, and can only provide anti-lock braking and achieve longitudinal stability control with the help of ABS or ESP (with both ABS function). Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an electronic power-assisted brake which has a simple structure, an ABS function, reduces the cost of the brake system and takes into account the safety performance of the brake system.

[0005] The present invention is achieved through the following technical solutions:

[0006] An electronic power-assisted brake with ABS function comprises a first oil cylinder, a second oil cylinder, a rocker arm, an ABS motor, a power-assisted motor, a main push rod and a secondary push rod. The power-assisted motor drives the main push rod to reciprocate horizontally. The rear end of the main push rod is hinged to a pedal, and the front end is connected to the rocker arm. The ABS motor drives the secondary push rod to reciprocate horizontally and the front end of the secondary push rod is connected to the end of the rocker arm. The first oil cylinder is connected to the second oil cylinder in parallel, and the ends of the piston rods of the first oil cylinder and the second oil cylinder are respectively connected to the rocker arm. The connection points of the piston rods of the first oil cylinder and the second oil cylinder and the rocker arm are respectively located on both sides of the connection point between the main push rod and the rocker arm.

[0007] Optimized, ABS motor and power-assist motor are both servo linear motors.

[0008] Furthermore, the distance between the connection point between the first oil cylinder piston rod and the swing rod and the connection point between the main push rod and the swing rod is equal to the distance between the connection point between the second oil cylinder piston rod and the swing rod and the connection point between the main push rod and the swing rod.

[0009] Optimally, the control end of the first oil cylinder is connected to the front wheel brake system on one side of the car and the rear wheel brake system on the other side, and the control end of the second oil cylinder is connected to the front wheel on the opposite side and the rear wheel brake system on the opposite side.

[0010] Advantageous Effects of the Invention

[0011] The electronic power-assisted brake with ABS function protected by the present invention has the following advantages:

[0012] 1. Make the traditional electronic power brake have ABS function;

[0013] 2. No need to install ABS and ESP, which directly reduces costs;

[0014] 3. Improve the system integration, simplify installation and coordination control issues;

[0015] 4. Conveniently combined with ESP to achieve stable control and meet the safety requirements of intelligent driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the prior art structure;

[0018] Figure 3 This is a control block diagram of the present invention;

[0019] In the figure, 1. pedal, 2. ABS motor, 3. auxiliary push rod, 4. rocker arm, 5. automobile fuel tank, 6. first oil cylinder, 7. second oil cylinder, 8. main push rod, 9. power assist motor, 10. first thin-walled cylindrical component, 11. second thin-walled cylindrical component, 12. claw, 13. slide groove, 14. slot. DETAILED DESCRIPTION

[0020] An electronic power-assisted brake with ABS function comprises a first oil cylinder 6, a second oil cylinder 7, a rocker arm 4, an ABS motor 2, a power-assisted motor 9, a main push rod 8 and an auxiliary push rod 3. The power-assisted motor drives the main push rod to reciprocate horizontally. The rear end of the main push rod is hinged to a pedal 1, and the front end is connected to the rocker arm. The ABS motor drives the auxiliary push rod to reciprocate horizontally and the front end of the auxiliary push rod is connected to the end of the rocker arm. The first oil cylinder is connected to the second oil cylinder in parallel, and the piston rod ends of the first oil cylinder and the second oil cylinder are respectively connected to the rocker arm. The connection points of the piston rods of the first oil cylinder and the second oil cylinder and the rocker arm are respectively located on both sides of the connection point between the main push rod and the rocker arm.

[0021] Optimized, the ABS motor and the power motor are both servo linear motors, the servo linear motors here are existing commercial products, and the servo linear motors can be but are not limited to DC brushless permanent magnet motors. The servo linear motor converts the rotational motion of the motor into the linear reciprocating motion of the main push rod and the auxiliary push rod through a mechanical transmission device such as a gear set or a roller screw.

[0022] Furthermore, the distance between the connection point between the first cylinder piston rod and the rocker arm and the connection point between the main push rod and the rocker arm is equal to the distance between the connection point between the second cylinder piston rod and the rocker arm and the connection point between the main push rod and the rocker arm, which can maintain the balance of braking force of all wheels and can well realize the anti-lock function of each wheel.

[0023] Optimized, the control end of the first oil cylinder is connected to the front wheel brake system on one side of the car and the rear wheel brake system on the other side, and the control end of the second oil cylinder is connected to the front wheel on the opposite side and the rear wheel brake system on the opposite side. It helps to achieve the braking function well and prevent the wheels on the same side or the two front wheels or the two rear wheels from locking at the same time. The wheel speed sensor is installed at the braking system. The wheel speed sensor monitors the speed of the corresponding wheel in real time and transmits the information to the controller. The controller receives the information from the wheel speed sensor. When the speed information received from a certain wheel is close to zero, it means that the wheel is locked. The controller will control the ABS motor and the power motor to move, drive the swing arm to swing, so that the first oil cylinder or the second oil cylinder controlling the wheel unloads oil, while the oil pressure of the oil cylinders controlling the remaining wheels remains unchanged, thereby realizing the anti-lock function of the wheel.

[0024] The present invention protects an electronic power-assisted brake with ABS function. When power-assisted braking is performed, the power-assisted motor drives the main push rod to drive two cylinders to achieve power-assisted braking. When the ABS function is required, the ABS motor controls the angle of the rocker arm to achieve independent pressure regulation of the two cylinders.

[0025] The specific control methods are as follows:

[0026] When the ABS motor pushes forward, the pressure in the first cylinder will increase, while the pressure in the second cylinder will decrease. Combined with the forward and backward control of the main push rod, the pressure in the second cylinder can be easily relieved while the pressure in the first cylinder remains unchanged, thereby realizing the anti-lock function of the corresponding wheels.

[0027] When the ABS motor moves backward, the pressure in the first cylinder will decrease, while the pressure in the second cylinder will increase. Combined with the forward and backward control of the main push rod, the pressure in the first cylinder can be easily relieved while the pressure in the second cylinder remains unchanged, thereby realizing the anti-lock function of the corresponding wheels.

[0028] The first oil cylinder and the second oil cylinder can be supplied with oil through the automobile oil tank 5, or a separate oil pot can be provided for supplying oil.

[0029] Since the first cylinder and the second cylinder control the wheels in different directions and positions respectively, when one wheel locks, the ABS motor can be used to control the angle of the sway arm, thereby adjusting the pressure of the connected master cylinder and coordinating with the advance and retreat of the main push rod to control the braking force of the wheel, easily realizing the anti-lock function of the wheel.

[0030] When the ABS function is not needed, the ABS motor adjusts the sway bar to a vertical state, and the forward and backward control of the main push rod can achieve brake pressure control of the two cylinders and maintain balance.

[0031] Compared with the traditional electronic booster, the electronic booster with ABS function protected by the present invention has a swing rod and an ABS motor added in front of the main push rod. The angle of the swing rod can be controlled by the ABS motor, and combined with the forward and backward control of the main push rod, the pressure control of the two cylinders can be easily realized, thereby realizing the anti-lock function of the wheel. Its structure is relatively simple, and it does not need to set up multiple solenoid valves, and it does not need to install ABS and ESP, and it can easily realize the anti-lock function, and the cost is relatively low. At the same time, the system integration is relatively high, and the hydraulic system control is adopted, and the action and control are relatively stable and reliable. It is also convenient to combine with ESP to achieve stable control and meet the safety requirements of intelligent driving.

[0032] In summary, the electronic power-assisted brake with ABS function protected by the present invention has a simple structure, has the ABS function, reduces the cost of the brake system and takes into account the safety performance of the brake system.

[0033] For those skilled in the art, the present invention may have various changes and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electronic power-assisted brake with ABS function, characterized in that: The invention comprises a first oil cylinder, a second oil cylinder, a rocker arm, an ABS motor, a power-assisting motor, a main push rod and an auxiliary push rod, wherein the power-assisting motor drives the main push rod to reciprocate horizontally, the rear end of the main push rod is hinged to the pedal, and the front end is connected to the rocker arm, the ABS motor drives the auxiliary push rod to reciprocate horizontally, and the front end of the auxiliary push rod is connected to the end of the rocker arm, the first oil cylinder is connected in parallel with the second oil cylinder, and the piston rod ends of the first oil cylinder and the second oil cylinder are respectively connected to the rocker arm, the connection points of the piston rods of the first oil cylinder and the second oil cylinder and the rocker arm are respectively located on both sides of the connection point of the main push rod and the rocker arm, the ABS motor and the power-assisting motor are both servo linear motors, the distance between the connection point of the piston rod of the first oil cylinder and the rocker arm to the connection point of the main push rod and the rocker arm is equal to the distance between the connection point of the piston rod of the second oil cylinder and the rocker arm to the connection point of the main push rod and the rocker arm, the control end of the first oil cylinder is connected to the front wheel brake system on one side of the automobile and the rear wheel brake system on the other side, and the control end of the second oil cylinder is connected to the front wheel on the opposite side and the rear wheel brake system on the opposite side.

Images