An air-assisted hydraulic control air valve for automotive braking

Abstract

The present invention provides a pneumatic-assisted hydraulic control air valve for automotive braking, comprising: a housing, a clutch hydraulic piston, a braking hydraulic piston and a braking piston. A clutch hydraulic chamber, a clutch air chamber, a braking hydraulic chamber and a braking air chamber are arranged inside the housing. The clutch hydraulic piston is arranged in the clutch hydraulic chamber, the braking hydraulic piston is arranged in the braking hydraulic chamber, and the braking piston is arranged in the braking air chamber. The clutch hydraulic piston, the braking hydraulic piston and the braking piston are all provided with gas channels. When the brake pedal is in the clutch state, the clutch hydraulic piston is pushed by hydraulic oil to move along the clutch hydraulic chamber, so that the gas channel on the clutch hydraulic piston is communicated with the clutch air chamber for clutch air intake. When the brake pedal is in the braking state, the braking hydraulic piston is pushed by hydraulic oil to move along the braking hydraulic chamber, so that the gas channel on the braking hydraulic piston is communicated with the braking air chamber to assist in pushing the braking piston to move. The present invention can reduce the pedal force for automotive braking.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive braking auxiliary equipment, and specifically to an air-assisted hydraulic control air valve for automotive braking. Background Art

[0002] Most automobiles use compressed air pressure or hydraulic pressure as the power source for braking. Since trucks have relatively large braking forces, pneumatic braking systems are usually adopted. In a pneumatic braking system, compressed air in the engine compressor is generally transmitted to a dryer for drying, and then the dried compressed air is transmitted to the main air reservoir. Then, the compressed air stored in the main air reservoir is distributed to the parking brake main air reservoir, the rear brake air reservoir, and the front brake air reservoir through a four-way valve for use in service braking and parking braking. At the same time, the main air reservoir, the front brake air reservoir, and the rear brake air reservoir are respectively controlled for air supply through hydraulic control air valves. When the brake pedal is depressed, the hydraulic oil needs to reach the hydraulic oil chambers of the hydraulic control air valve through relatively long oil pipes. Since the stroke of the master cylinder is limited and the amount of hydraulic oil driven is also limited, the hydraulic chamber of this hydraulic control air valve cannot be too large. Therefore, to ensure the piston strokes of the clutch and the brake, the diameter of this piston should not be too large, which results in a relatively large pedal force of the brake pedal. A relatively large brake pedal force will cause the driver to easily become fatigued during frequent braking, thus posing a danger. Therefore, how to provide a hydraulic control air valve to reduce the brake pedal force is of great significance. Summary of the Invention

[0003] The present invention provides an air-assisted hydraulic control air valve for automotive braking, which solves the problem that the existing hydraulic control air valve of an automobile requires a large brake pedal force, can reduce the brake pedal force of an automobile, and improve the convenience and safety of the driver's operation.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] An air-assisted hydraulic control air valve for automotive braking, comprising: a housing, a clutch hydraulic piston, a brake hydraulic piston, and a brake piston;

[0006] A clutch hydraulic chamber, a clutch air chamber, a brake hydraulic chamber, and a brake air chamber are respectively arranged inside the housing. The clutch hydraulic piston is arranged in the clutch hydraulic chamber, the brake hydraulic piston is arranged in the brake hydraulic chamber, and the brake piston is arranged in the brake air chamber;

[0007] The clutch hydraulic piston, the brake hydraulic piston, and the brake piston are all provided with gas channels. When the brake pedal is in the clutch state, the clutch hydraulic piston is pushed by hydraulic oil to move along the clutch hydraulic chamber, so that the gas channel on the clutch hydraulic piston is communicated with the clutch air chamber for clutch air intake;

[0008] When the brake pedal is in the braking state, the brake hydraulic piston is pushed by hydraulic oil to move along the brake hydraulic chamber, so that the gas passage on the brake hydraulic piston is communicated with the brake air chamber to assist in pushing the brake piston to move.

[0009] Preferably, it further includes: a clutch hydraulic return spring, a brake hydraulic return spring, and a brake return spring;

[0010] The clutch hydraulic return spring is arranged at the bottom of the clutch hydraulic chamber to drive the clutch hydraulic piston to reset when the brake pedal is released;

[0011] The brake hydraulic return spring is arranged at the bottom of the brake hydraulic chamber to drive the brake hydraulic piston to reset when the brake pedal is released;

[0012] The brake return spring is arranged at the bottom of the brake air chamber to drive the brake piston to reset when the brake pedal is released.

[0013] Preferably, the clutch hydraulic piston, the brake hydraulic piston, and the brake piston are all of cylindrical structure.

[0014] Preferably, the housing is of T-shaped structure.

[0015] Preferably, the brake air chamber is axially arranged along the central axis of the housing, the clutch hydraulic chamber and the brake hydraulic chamber are respectively arranged on both sides of the brake air chamber, and the clutch air chamber is arranged at the front end of the brake air chamber.

[0016] Preferably, a rear brake air intake and a rear brake air outlet are symmetrically arranged on the housing, and a first gas passage is provided on the brake piston and makes the first gas passage correspond to the rear brake air intake and the rear brake air outlet respectively.

[0017] Preferably, a front brake air intake and a front brake air outlet are symmetrically arranged on the housing, and a second gas passage is provided on the brake piston and makes the second gas passage correspond to the front brake air intake and the front brake air outlet respectively.

[0018] Preferably, a clutch air chamber air intake and a first valve body air intake are symmetrically arranged on the housing, and a third gas passage is provided on the clutch hydraulic piston and makes the third gas passage correspond to the clutch air chamber air intake and the first valve body air intake respectively.

[0019] Preferably, a brake air chamber air intake and a second valve body air intake are symmetrically arranged on the housing, and a fourth gas passage is provided on the brake hydraulic piston and makes the fourth gas passage correspond to the brake air chamber air intake and the second valve body air intake respectively.

[0020] Preferably, the housing is provided with a first hydraulic oil inlet, a second hydraulic oil inlet, and a clutch air extraction outlet;

[0021] The first hydraulic oil inlet is communicated with the clutch hydraulic cavity, the second hydraulic oil inlet is communicated with the brake hydraulic cavity, and the clutch air extraction outlet is communicated with the clutch air cavity.

[0022] The present invention provides a gas-assisted hydraulic control gas valve for vehicle braking. A clutch hydraulic cavity, a clutch air cavity, a brake hydraulic cavity, and a brake air cavity are respectively arranged in the housing, so that when the brake pedal is depressed, clutch air extraction and brake air extraction can be carried out separately, avoiding piston drive for clutch and brake simultaneously. The problem that the hydraulic control gas valve of the existing vehicle requires a large brake pedal force is solved, the brake pedal force of the vehicle can be reduced, and the convenience and safety of the driver's operation can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below.

[0024] Figure 1 FIG. is a schematic structural diagram of a gas-assisted hydraulic control gas valve for vehicle braking provided by the present invention.

[0025] Figure 2 FIG. is a schematic diagram of the gas-assisted hydraulic control gas valve in the clutch working state provided by an embodiment of the present invention.

[0026] Figure 3 FIG. is a schematic diagram of the gas-assisted hydraulic control gas valve in the brake working state provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the drawings and embodiments.

[0028] Aiming at the problem that the structure of the current vehicle hydraulic control gas valve is prone to causing a large brake pedal force, the present invention provides a gas-assisted hydraulic control gas valve for vehicle braking, which solves the problem that the hydraulic control gas valve of the existing vehicle requires a large brake pedal force, can reduce the brake pedal force of the vehicle, and improve the convenience and safety of the driver's operation.

[0029] As Figures 1 to 3As shown in the figure, a pneumatic-assisted hydraulically controlled pneumatic valve for vehicle braking includes: a housing 1, a clutch hydraulic piston 6, a brake hydraulic piston 7, and a brake piston 8. A clutch hydraulic chamber 2, a clutch pneumatic chamber 3, a brake hydraulic chamber 4, and a brake pneumatic chamber 5 are respectively arranged inside the housing 1. The clutch hydraulic piston 6 is arranged inside the clutch hydraulic chamber 2, the brake hydraulic piston 7 is arranged inside the brake hydraulic chamber 4, and the brake piston 8 is arranged inside the brake pneumatic chamber 5. The clutch hydraulic piston 6, the brake hydraulic piston 7, and the brake piston 8 are all provided with gas channels. When the brake pedal is in the clutch state, the clutch hydraulic piston 6 is pushed by hydraulic oil to move along the clutch hydraulic chamber, so that the gas channel on the clutch hydraulic piston 6 is communicated with the clutch pneumatic chamber for clutch air intake. When the brake pedal is in the braking state, the brake hydraulic piston 7 is pushed by hydraulic oil to move along the brake hydraulic chamber, so that the gas channel on the brake hydraulic piston 7 is communicated with the brake pneumatic chamber to assist in pushing the brake piston 8 to move.

[0030] Specifically, when the driver starts to step on the brake pedal and it is in the clutch state, hydraulic oil enters the clutch hydraulic chamber, pushing the clutch hydraulic piston 6 to move rightward, so that the gas channel on the clutch hydraulic piston 6 connects the clutch pneumatic chamber 3 with the air cylinder supply pipeline, enabling high-pressure boost gas to enter through the clutch pneumatic chamber 3, and at this time the clutch boost starts to work. When the driver continues to step on the brake pedal and it is in the braking state, hydraulic oil enters the brake hydraulic chamber 4 and pushes the brake hydraulic piston 7 to move rightward, so that the gas channel on the brake hydraulic piston 7 connects the brake hydraulic chamber 4 with the air cylinder supply pipeline, enabling the brake to start working. This pneumatic valve is respectively provided with a clutch hydraulic chamber, a clutch pneumatic chamber, a brake hydraulic chamber, and a brake pneumatic chamber, so that when the brake pedal is depressed, clutch air intake and brake air intake can be carried out separately, avoiding simultaneous piston drive for clutch and brake. It solves the problem that the hydraulically controlled pneumatic valve of existing vehicles requires a large brake pedal force, can reduce the brake pedal force of the vehicle, and improve the convenience and safety of the driver's operation.

[0031] The pneumatic valve further includes: a clutch hydraulic return spring 9, a brake hydraulic return spring 10, and a brake return spring 11. The clutch hydraulic return spring 9 is arranged at the bottom of the clutch hydraulic chamber 2 to drive the clutch hydraulic piston 6 to reset when the brake pedal is released. The brake hydraulic return spring 10 is arranged at the bottom of the brake hydraulic chamber 4 to drive the brake hydraulic piston 7 to reset when the brake pedal is released. The brake return spring 11 is arranged at the bottom of the brake pneumatic chamber 5 to drive the brake piston to reset when the brake pedal is released.

[0032] In practical applications, when the driver releases the pedal, due to the decrease in the pressure of the hydraulic oil chamber, the brake hydraulic piston 7 starts to move leftward under the action of the brake return spring, and releases the high-pressure gas in the brake air chamber from the air release port. Due to the decrease in air pressure, the brake piston 8 moves leftward under the action of the return spring. At the same time, the pressure of the clutch hydraulic chamber 2 decreases, and the clutch hydraulic piston 6 starts to move leftward under the action of the clutch return spring 9, releasing the high-pressure gas in the clutch air chamber. Due to the decrease in air pressure, the clutch function is turned off.

[0033] Further, the clutch hydraulic piston 6, the brake hydraulic piston 7, and the brake piston 8 are all of cylindrical structure.

[0034] Further, the housing 1 is of T-shaped structure.

[0035] Further, the brake air chamber 5 is axially arranged along the central axis of the housing, the clutch hydraulic chamber 2 and the brake hydraulic chamber 4 are respectively arranged on both sides of the brake air chamber 5, and the clutch air chamber 3 is arranged at the front end of the brake air chamber 5.

[0036] Further, a rear brake air intake port 12 and a rear brake air outlet 13 are symmetrically arranged on the housing 1, and a first gas channel 81 is provided on the brake piston 8, and the first gas channel 81 is respectively corresponding to the rear brake air intake port 12 and the rear brake air outlet 13.

[0037] Further, a front brake air intake port 14 and a front brake air outlet 15 are symmetrically arranged on the housing 1, and a second gas channel 82 is provided on the brake piston 8, and the second gas channel 82 is respectively corresponding to the front brake air intake port 14 and the front brake air outlet 15.

[0038] Further, a clutch air chamber air intake port and a first valve body air intake port 16 are symmetrically arranged on the housing 1, and a third gas channel 61 is provided on the clutch hydraulic piston 6, and the third gas channel 61 is respectively corresponding to the clutch air chamber air intake port and the first valve body air intake port.

[0039] Further, a brake air chamber air intake port and a second valve body air intake port 17 are symmetrically arranged on the housing, and a fourth gas channel 71 is provided on the brake hydraulic piston 7, and the fourth gas channel 71 is respectively corresponding to the brake air chamber air intake port and the second valve body air intake port 17.

[0040] Further, the housing is provided with a first hydraulic oil inlet 18, a second hydraulic oil inlet 19, and a clutch air intake outlet 20.

[0041] The first hydraulic oil inlet 18 is in communication with the clutch hydraulic chamber 2, the second hydraulic oil inlet 19 is in communication with the brake hydraulic chamber 4, and the clutch air extraction outlet is in communication with the clutch air chamber.

[0042] In practical applications, when the driver starts to step on the brake pedal, hydraulic oil enters the clutch hydraulic chamber 2 and the brake hydraulic chamber 4, pushing the clutch hydraulic piston 6 to move rightward, and the hydraulic return spring 9 intervenes. When the third gas passage 61 is in communication with the first valve body air extraction port 16, high-pressure boost gas enters from the first valve body air extraction port 16, passes through the third gas passage 61 and the clutch air chamber air extraction port into the clutch air chamber 3, and supplies gas to the clutch air extraction outlet 20 at the same time. At this time, the clutch boost starts to work.

[0043] When the driver continues to step on the brake pedal, the pressure in the brake hydraulic chamber 4 increases, pushing the brake hydraulic piston 7 to move rightward, opening the second valve body air extraction port 17, and gas enters the brake air chamber 5, pushing the brake piston 8 to move rightward until the first gas passage 81 of the rear brake gas is in communication with the rear brake air extraction inlet 12 and the rear brake air extraction outlet 13 respectively, and the second gas passage 82 of the front brake gas is in communication with the front brake air extraction inlet 14 and the front brake air extraction outlet 15 respectively, and the front and rear brakes start to work.

[0044] When the driver releases the pedal, due to the decrease in the pressure in the brake hydraulic chamber 4, the brake hydraulic piston 7 starts to move leftward under the action of the brake hydraulic return spring 10, closing the second valve body air extraction port 17, and at the same time discharging the high-pressure gas in the brake air chamber 5 from the air release port. Due to the decrease in air pressure, the brake piston 8 moves leftward under the action of the brake return spring 11, closing the front brake air extraction inlet 14 and the rear brake air extraction inlet 12, and the valve body closes the brake function; at the same time, the pressure in the clutch hydraulic chamber 2 decreases, and the clutch hydraulic piston 6 starts to move leftward under the action of the clutch hydraulic return spring 9, closing the first valve body air extraction port 16 of the valve body, and at the same time discharging the high-pressure gas in the clutch air chamber 3 from the air release port. Due to the decrease in air pressure, the clutch function is closed.

[0045] The clutch hydraulic return spring and the brake hydraulic return spring can adopt springs with different stiffnesses. When the driver starts to step on the brake pedal, the clutch hydraulic return spring starts to intervene. After the clutch hydraulic return spring is fully involved in the work, the driver will feel that the pedal becomes hard. If the driver's intention is to shift gears at this time, keep the pedal opening at this time, shift gears normally, and then release the pedal; if the driver's intention is to brake at this time, only need to continue to step on the pedal to make the brake hydraulic spring start to work.

[0046] It can be seen that the present invention provides a pneumatic-assisted hydraulic control air valve for vehicle braking. A clutch hydraulic chamber, a clutch air chamber, a braking hydraulic chamber and a braking air chamber are respectively arranged in the housing, so that when the brake pedal is depressed, air intake for clutch and air intake for braking can be separately performed, avoiding piston drive for clutch and braking simultaneously. The problem that the hydraulic control air valve of the existing vehicle requires a large brake pedal force is solved, the brake pedal force of the vehicle can be reduced, and the convenience and safety of the driver's operation can be improved.

[0047] The structure, features and function effects of the present invention have been described in detail based on the illustrated embodiments above. The above are only the preferred embodiments of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or equivalent embodiments modified into equivalent changes, should still be within the protection scope of the present invention as long as they do not exceed the spirit covered by the specification and the drawings.

Claims

1. An air-assisted hydraulically controlled air valve for vehicle braking, characterized in that, Comprising: A housing, a clutch hydraulic piston, a brake hydraulic piston, and a brake piston; A clutch hydraulic chamber, a clutch air chamber, a brake hydraulic chamber, and a brake air chamber are provided inside the housing. The clutch hydraulic piston is arranged in the clutch hydraulic chamber, the brake hydraulic piston is arranged in the brake hydraulic chamber, and the brake piston is arranged in the brake air chamber; The clutch hydraulic piston, the brake hydraulic piston, and the brake piston are all provided with gas channels. When the brake pedal is in the clutch state, the clutch hydraulic piston is pushed by hydraulic oil to move along the clutch hydraulic chamber, so that the gas channel on the clutch hydraulic piston is communicated with the clutch air chamber for clutch air intake; When the brake pedal is in the braking state, the brake hydraulic piston is pushed by hydraulic oil to move along the brake hydraulic chamber, so that the gas channel on the brake hydraulic piston is communicated with the brake air chamber to assist in pushing the brake piston to move.

2. The air-assisted hydraulically controlled air valve for vehicle braking according to claim 1, characterized in that, Further comprising: A clutch hydraulic return spring, a brake hydraulic return spring, and a brake return spring; The clutch hydraulic return spring is arranged at the bottom of the clutch hydraulic chamber to drive the clutch hydraulic piston to reset when the brake pedal is released; The brake hydraulic return spring is arranged at the bottom of the brake hydraulic chamber to drive the brake hydraulic piston to reset when the brake pedal is released; The brake return spring is arranged at the bottom of the brake air chamber to drive the brake piston to reset when the brake pedal is released.

3. The air-assisted hydraulically controlled air valve for vehicle braking according to claim 2, characterized in that, The clutch hydraulic piston, the brake hydraulic piston, and the brake piston are all of cylindrical structure.

4. The air-assisted hydraulically controlled air valve for vehicle braking according to claim 3, characterized in that, The housing is of a T-shaped structure.

5. The air-assisted hydraulically controlled air valve for vehicle braking according to claim 4, characterized in that, The brake air chamber is axially arranged along the central axis of the housing. The clutch hydraulic chamber and the brake hydraulic chamber are respectively arranged on both sides of the brake air chamber, and the clutch air chamber is arranged at the front end of the brake air chamber.

6. The air-assisted hydraulically controlled air valve for vehicle braking according to claim 5, characterized in that, A rear brake air intake port and a rear brake air outlet are symmetrically arranged on the housing. The brake piston is provided with a first gas channel, and the first gas channel is respectively corresponding to the rear brake air intake port and the rear brake air outlet.

7. The air-assisted hydraulically controlled air valve for vehicle braking according to claim 6, characterized in that, A front brake air intake port and a front brake air outlet are symmetrically arranged on the housing. The brake piston is provided with a second gas channel, and the second gas channel is respectively corresponding to the front brake air intake port and the front brake air outlet.

8. The air-assisted hydraulically controlled air valve for vehicle braking according to claim 7, characterized in that, A clutch air chamber air intake port and a first valve body air intake port are symmetrically arranged on the housing. The clutch hydraulic piston is provided with a third gas channel, and the third gas channel is respectively corresponding to the clutch air chamber air intake port and the first valve body air intake port.

9. The air-assisted hydraulically controlled air valve for vehicle braking according to claim 8, characterized in that, A brake air chamber air intake port and a second valve body air intake port are symmetrically arranged on the housing. The brake hydraulic piston is provided with a fourth gas channel, and the fourth gas channel is respectively corresponding to the brake air chamber air intake port and the second valve body air intake port.

10. The air-assisted hydraulically controlled air valve for vehicle braking according to claim 9, characterized in that, The housing is provided with a first hydraulic oil inlet, a second hydraulic oil inlet, and a clutch air intake outlet; The first hydraulic oil inlet is communicated with the clutch hydraulic chamber, the second hydraulic oil inlet is communicated with the brake hydraulic chamber, and the clutch air intake outlet is communicated with the clutch air chamber.

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