Double-loop pressurizing master cylinder suitable for drive-by-wire hydraulic brake boosting unit

Abstract

The utility model relates to a double-loop pressurizing main cylinder suitable for a drive-by-wire hydraulic brake boosting unit, and belongs to the field of automobile drive-by-wire brake systems. The first piston component and the second piston component are installed in two pressurizing cavities of the pressurizing cylinder body respectively, the first auxiliary leather cup and the first main leather cup are assembled between the pressurizing cylinder body and the first piston component, and the second auxiliary leather cup and the second main leather cup are assembled between the pressurizing cylinder body and the second piston component. The pressure boosting device has the advantages that the structure is novel, when a single pressure boosting cavity leaks, the other pressure boosting cavity continues to work, it is ensured that a braking system can still maintain enough pressure, and the safety risk caused by braking failure of a whole vehicle is effectively avoided. And due to the design of the double booster cavities, higher system redundancy and a more flexible brake control strategy are further brought, the brake requirement of a driver can be responded more quickly and more accurately, and the stability and safety of vehicle driving are ensured.

Description

Technical Field

[0001] The utility model belongs to the field of automotive electronic hydraulic braking systems, and particularly relates to a dual-circuit supercharging master cylinder applicable to an electronic hydraulic braking booster unit. Background Art

[0002] Existing electronic hydraulic braking booster units mainly include a simulation master cylinder, a reservoir, a simulator, a booster motor, a transmission mechanism, a supercharging cylinder, and an ECU. During operation, the simulation master cylinder collects the driver's braking intention and braking intensity requirements, and transmits the braking requirements to the ECU through sensors. The ECU controls the rotation of the motor, amplifies the motor torque through the transmission mechanism, and converts the rotational force into a linear thrust to push the piston to compress the brake fluid in the cylinder body to brake the entire vehicle. Since the existing supercharging cylinder bodies all adopt a single supercharging chamber design, if leakage occurs, the entire braking system cannot build pressure, posing a huge safety hazard to the entire vehicle. Summary of the Invention

[0003] The utility model provides a dual-circuit supercharging master cylinder applicable to an electronic hydraulic braking booster unit to solve the problem that the single supercharging chamber in the prior art may cause the entire braking system to fail to build pressure in case of leakage, posing a huge safety hazard to the entire vehicle.

[0004] The technical solution adopted by the utility model is as follows: it includes a first piston component, a first secondary leather cup, a first main leather cup, a second piston component, a second secondary leather cup, a second main leather cup, and a supercharging cylinder body. The first piston component and the second piston component are respectively installed in two supercharging chambers of the supercharging cylinder body. The first secondary leather cup and the first main leather cup are assembled between the supercharging cylinder body and the first piston component, and the second secondary leather cup and the second main leather cup are assembled between the supercharging cylinder body and the second piston component.

[0005] The supercharging cylinder body includes a first chamber, a second chamber, a first-chamber supercharging pipeline, a second-chamber supercharging pipeline, a first-chamber liquid replenishing pipeline, and a second-chamber liquid replenishing pipeline. The first-chamber supercharging pipeline and the first-chamber liquid replenishing pipeline are connected to the first chamber, and the second-chamber supercharging pipeline and the second-chamber liquid replenishing pipeline are connected to the second chamber.

[0006] The utility model has the advantages of novel structure. When leakage occurs in a single supercharging chamber, the other supercharging chamber can continue to work, ensuring that the braking system can still maintain sufficient pressure, effectively avoiding the safety risks brought by brake failure of the entire vehicle. The design of the dual supercharging chambers also brings higher system redundancy and more flexible braking control strategies. In complex driving environments, such as high-speed driving, emergency braking, or slippery road surfaces, the electronic hydraulic braking booster unit can respond to the driver's braking requirements more quickly and accurately, ensuring the stability and safety of vehicle driving. Description of the Drawings

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present invention and these drawings.

[0008] Figure 1 is the structural schematic diagram of the present invention;

[0009] Figure 2 is the structural schematic diagram of the pressure boosting cylinder block of the present invention. Specific Embodiments

[0010] The following will further elaborate on the present invention in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0011] As Figure 1 shown, it includes a first piston component 1, a first auxiliary leather cup 2, a first main leather cup 3, a second piston component 4, a second auxiliary leather cup 5, a second main leather cup 6, and a pressure boosting cylinder block 7. The first piston component 1 and the second piston component 4 are respectively installed in two pressure boosting chambers of the pressure boosting cylinder block 7. The first auxiliary leather cup 2 and the first main leather cup 3 are assembled between the pressure boosting cylinder block 7 and the first piston component 1, and the second auxiliary leather cup 5 and the second main leather cup 6 are assembled between the pressure boosting cylinder block 7 and the second piston component 4.

[0012] As Figure 2 shown, the pressure boosting cylinder block 7 includes a first chamber 701, a second chamber 702, a first chamber pressure boosting pipeline 703, a second chamber pressure boosting pipeline 704, a first chamber liquid supplement pipeline 705, and a second chamber liquid supplement pipeline 706. The first chamber pressure boosting pipeline 703 and the first chamber liquid supplement pipeline 705 are connected to the first chamber 701, and the second chamber pressure boosting pipeline 704 and the second chamber liquid supplement pipeline 706 are connected to the second chamber 702.

[0013] Working Principle

[0014] Install the present invention on a suitable wire-controlled hydraulic power assist unit. During operation, the simulated master cylinder collects the driver's braking intention and braking intensity requirement, transmits the braking requirement to the ECU through a sensor, the ECU controls the motor to rotate, amplifies the motor torque through a transmission mechanism and converts the rotational force into a linear thrust, pushes the piston to compress the brake fluid in the cylinder to brake the whole vehicle. By adopting a double pressure boosting circuit structure, the pressure boosting cylinder is divided into two independent pressure boosting chambers, so that when one chamber fails, it can ensure that the other chamber can still provide a certain braking pressure, improving the safety and reliability of the whole vehicle.

[0015] The preferred embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the protection scope of the present utility model is not limited to the specific details in the above embodiments. Within the technical concept of the present utility model, any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and these simple variations all fall within the protection scope of the present utility model.

Claims

1. A dual-circuit supercharging master cylinder applicable to a by-wire hydraulic braking booster unit, characterized in that: It includes a first piston component, a first auxiliary leather cup, a first main leather cup, a second piston component, a second auxiliary leather cup, a second main leather cup and a supercharging cylinder block. The first piston component and the second piston component are respectively installed in two supercharging chambers of the supercharging cylinder block. The first auxiliary leather cup and the first main leather cup are assembled between the supercharging cylinder block and the first piston component. The second auxiliary leather cup and the second main leather cup are assembled between the supercharging cylinder block and the second piston component.

2. The dual-circuit boost master cylinder applicable to the by-wire hydraulic braking booster unit according to claim 1, wherein: The supercharging cylinder block includes a first chamber, a second chamber, a first-chamber supercharging pipeline, a second-chamber supercharging pipeline, a first-chamber liquid supplement pipeline and a second-chamber liquid supplement pipeline. The first-chamber supercharging pipeline and the first-chamber liquid supplement pipeline are communicated with the first chamber. The second-chamber supercharging pipeline and the second-chamber liquid supplement pipeline are communicated with the second chamber.

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