A replenishing valve structure suitable for a hydraulic brake system of an automobile

Abstract

The utility model relates to a kind of liquid supplementing valve structures suitable for automobile hydraulic brake system, belong to the field of automobile brake-by-wire system.Sealing valve seat is located in valve body, limiting valve seat is threadedly connected with valve body, sealing valve seat rear end face and limiting valve seat front end face top, sealing valve core front end is located in the liquid supplementing hole of valve body, valve core spring is located between sealing valve core and sealing valve seat, sealing valve core rear end boss and valve port boss of valve body are tightly sealed by toping.The advantage is novel structure, access between liquid storage tank and booster cylinder, when brake system booster cylinder needs to be quickly liquid-supplemented, booster cylinder piston is quickly returned, negative pressure is generated in booster cylinder, valve core spring resistance is overcome to push valve core to move, open liquid supplementing hole, brake fluid is directly supplemented in booster cylinder from brake liquid storage tank, ensure brake efficiency;The problem that whole vehicle brake failure is caused due to the low booster cylinder liquid-supplementing rate is solved, effectively improve booster cylinder liquid-supplementing efficiency, improve whole vehicle safety.

Description

Technical Field

[0001] This utility model belongs to the field of automotive brake-by-wire systems, specifically relating to a fluid replenishment valve structure suitable for automotive hydraulic braking systems. Background Technology

[0002] With the development of the automotive industry, brake-by-wire products have gradually become the main development direction of the braking market. In application, brake-by-wire products offer faster braking response time, more precise control accuracy, intelligent control, and energy recovery capabilities, gaining widespread market recognition. However, due to the unique system logic of hydraulic brake-by-wire products, under conditions such as ABS, ESC, and TCS, the booster cylinder needs to continuously and rapidly build up pressure. A simple solenoid valve flow path is insufficient to meet the rapid fluid replenishment requirements of the booster cylinder, resulting in low pressure build-up rate and risks such as brake failure. Summary of the Invention

[0003] This invention provides a fluid replenishment valve structure suitable for automotive hydraulic braking systems to solve the problem of vehicle braking failure caused by low fluid replenishment rate of the booster cylinder.

[0004] The technical solution adopted by this utility model includes a valve body, a sealing valve core, a valve core spring, a sealing valve seat, and a limiting valve seat. The sealing valve seat is located in the valve body, the limiting valve seat is threaded to the valve body, the rear end face of the sealing valve seat is in contact with the front end face of the limiting valve seat, the front end of the sealing valve core is located in the liquid filling hole of the valve body, and the valve core spring is located between the sealing valve core and the sealing valve seat, which presses the rear end boss of the sealing valve core against the valve port boss of the valve body to seal it.

[0005] The valve body has a liquid inlet hole, a valve port boss, a sealing valve seat boss, a cavity, a liquid outlet hole, and a limit valve seat connecting thread. The liquid inlet hole is connected to the cavity, the cavity is connected to the liquid outlet hole, and the limit valve seat is connected to the limit valve seat thread through the limit valve seat connecting thread.

[0006] The sealing valve core has a boss, the front of which forms a valve port with the valve port boss of the valve body, and the rear of which is used for the spring seat of the valve core spring.

[0007] The sealing valve seat has a sealing ring groove in the middle and a limiting boss at the rear, with the sealing ring located in the sealing ring groove.

[0008] The advantages of this invention are its novel structure, connecting the reservoir and the booster cylinder. When the booster cylinder requires rapid fluid replenishment, the piston quickly returns to its original position, creating negative pressure within the cylinder. This negative pressure overcomes the resistance of the valve core spring, pushing the valve core to move and opening the replenishment port. Brake fluid is then directly replenished from the reservoir into the booster cylinder, ensuring braking efficiency. The invention also features good sealing, utilizing a valve core spring and a valve core limiting structure. It can be customized to meet system requirements, offering better adaptability and flexible system matching. This design solves the problem of vehicle braking failure caused by low booster cylinder replenishment rates, effectively improving booster cylinder replenishment efficiency and enhancing overall vehicle safety. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 This is a structural schematic diagram of the valve body, sealing valve core, and sealing valve seat of this utility model;

[0011] Figure 3 This is a view illustrating the sealing working principle of this utility model;

[0012] Figure 4 This is a diagram illustrating the working principle of the fluid replenishment function of this utility model. Detailed Implementation

[0013] See Figure 1 The valve body includes a valve body 1, a sealing valve core 2, a valve core spring 3, a sealing valve seat 5, and a limiting valve seat 6. The sealing valve seat 5 is located in the valve body 1, and the limiting valve seat 6 is threaded to the valve body 1. The rear end face of the sealing valve seat 5 is in contact with the front end face of the limiting valve seat 6. The front end of the sealing valve core 2 is located in the liquid replenishment hole 101 of the valve body 1. The valve core spring 3 is located between the sealing valve core 2 and the sealing valve seat 5, which presses the rear end boss 201 of the sealing valve core 2 against the valve port boss 102 of the valve body 1 to seal it.

[0014] See Figure 2 The valve body 1 has a liquid replenishment hole 101, a valve port boss 102, a sealing valve seat boss 103, a cavity 104, a liquid outlet hole 105, and a limit valve seat connecting thread 106. The liquid replenishment hole 101 is connected to the cavity 104, the cavity 104 is connected to the liquid outlet hole 105, and the limit valve seat is threadedly connected to the limit valve seat 6 through the limit valve seat connecting thread 106.

[0015] See Figure 2 The sealing valve core 2 has a boss 201. The front of the boss 201 forms a valve port A with the valve port boss 102 of the valve body 1, and the rear of the boss 201 is used for the spring seat of the valve core spring 3.

[0016] See Figure 2 The sealing valve seat 5 has a sealing ring groove 501 in the middle and a limiting boss 502 at the rear. The sealing ring 4 is located in the sealing ring groove 501.

[0017] Working principle

[0018] See Figure 3 Connect the liquid inlet 101 of valve body 1 to the liquid storage tank 7, and the liquid outlet 105 to the booster cylinder 8. When the system pressure is static, the boss 201 of the sealing valve core 2 is sealed to the valve port boss 102 of valve body 1 by the resistance of the valve core spring 3. When the booster cylinder pressurizes, the sealing valve core 2 is subjected to pressure and the sealing effect is better; see also Figure 4 When the brake system booster cylinder 8 needs to be replenished quickly, the booster cylinder piston returns quickly, creating a negative pressure inside the booster cylinder. Under the vacuum force of the booster system, the valve core component 2 overcomes the resistance of the valve core spring 3, pushing the valve core 2 to move, opening the valve port A between it and the valve body 1, and then opening the replenishment hole 101, allowing brake fluid to be replenished directly into the booster cylinder from the brake fluid reservoir 7.

[0019] It adopts a combination of valve body, valve core, valve core spring, sealing seat, sealing ring and limit seat, which has good sealing performance; it uses valve core spring and limit valve core structure, which can be customized according to system needs, and has better adaptability.

Claims

1. A fluid replenishment valve structure suitable for automotive hydraulic braking systems, characterized in that: It includes a valve body, a sealing valve core, a valve core spring, a sealing valve seat, and a limit valve seat. The sealing valve seat is located in the valve body, and the limit valve seat is threaded to the valve body. The rear end face of the sealing valve seat abuts against the front end face of the limit valve seat. The front end of the sealing valve core is located in the liquid inlet of the valve body. The valve core spring is located between the sealing valve core and the sealing valve seat, and it presses the rear end boss of the sealing valve core against the valve port boss of the valve body to seal it.

2. The fluid replenishing valve structure for an automotive hydraulic braking system according to claim 1, characterized in that: The valve body has a liquid inlet hole, a valve port boss, a sealing valve seat boss, a cavity, a liquid outlet hole, and a limit valve seat connecting thread. The liquid inlet hole is connected to the cavity, the cavity is connected to the liquid outlet hole, and the limit valve seat is connected to the limit valve seat thread through the limit valve seat connecting thread.

3. The fluid replenishment valve structure for an automotive hydraulic braking system according to claim 1, wherein the sealing valve core has a boss, the front of which forms a valve port with the valve port boss of the valve body, and the rear of which is used for a spring seat for the valve core spring.

4. The fluid replenishment valve structure for an automotive hydraulic braking system according to claim 1, wherein the sealing valve seat has a sealing ring groove in the middle and a limiting boss at the rear, and the sealing ring is located in the sealing ring groove.

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