Pneumatic brake type front loop emergency braking system and using method thereof

Abstract

The invention discloses an air brake type front loop emergency braking system and a using method thereof.The air brake type front loop emergency braking system comprises an air brake front module, a front conventional air brake pipeline, a front emergency air brake device and a control system, and the air brake front module is connected with the front conventional air brake pipeline and the front emergency air brake device; the front emergency air brake device comprises a spare tire and an emergency pipeline connected with the spare tire; the control system comprises a detection assembly and a control assembly, and the detection assembly is connected with the front conventional air brake pipeline and the rear conventional air brake pipeline and used for detecting the air pressure of the front conventional air brake pipeline and the air pressure of the rear conventional air brake pipeline. The control assembly is connected with the conventional air brake pipeline and the emergency pipeline and used for controlling connection and disconnection among the conventional air brake pipeline, the emergency pipeline and the air brake front module. According to the scheme, the spare tire which is idle for a long time is reasonably utilized, the front loop emergency braking system adopts an independent air source on the premise that an additional air storage device is not added, and failure of the emergency braking system is avoided.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and specifically relates to an air brake type front circuit emergency braking system and a method of using the same. Background Art

[0002] In the field of commercial vehicles, the air brake system includes a front axle parking brake mechanism and a rear axle parking brake mechanism, which are controlled by the front air brake circuit and the rear air brake circuit respectively. The existing air brake emergency brake system is usually combined with the rear axle parking brake system. When encountering an emergency situation such as failure of the conventional brake system during driving, the high-pressure gas in the rear axle parking air chamber is released, so that the force stored in the parking energy storage spring directly acts on the rear axle camshaft, and the force is transmitted to the wheel end brake through the camshaft, thereby achieving the effect of emergency braking. However, this emergency braking method has the following problems:

[0003] 1. During the entire emergency braking process, only the rear axle parking brake mechanism participates in the emergency braking, and the wheel-end brakes of the front axle parking brake system are in an idle state and do not participate in the emergency braking, resulting in a waste of braking resources;

[0004] 2. In the emergency braking state, the center of gravity of the vehicle will move forward and the rear of the vehicle will be lifted due to inertia, resulting in a decrease in the friction resistance between the rear wheels and the ground. This results in a relatively poor braking effect when only the rear axle parking brake system is used for emergency braking;

[0005] 3. If only the rear axle wheel-end brakes participate in emergency braking, the rear axle wheel-end brakes will be subjected to a large load in a short period of time during the emergency braking process. If the rear axle wheel-end brakes fail due to overload during emergency braking, the entire vehicle will completely lose braking force, posing a major safety hazard.

[0006] This shows that the prior art still has certain defects. Summary of the invention

[0007] The present application provides an air brake type front circuit emergency braking system and a method of using the same to solve at least one of the above technical problems.

[0008] The technical solution adopted in this application is:

[0009] In the first aspect, the present application provides an air brake type front circuit emergency brake system, comprising an air brake front module, a front conventional air brake pipeline, a front emergency air brake device and a control system, wherein the air brake front module is respectively connected to the front conventional air brake pipeline and the front emergency air brake device; the front emergency air brake device comprises a spare tire and an emergency pipeline connected to the spare tire; the control system comprises a detection component and a control component, the detection component is respectively connected to the front conventional air brake pipeline and the rear conventional air brake pipeline for detecting the air pressure of the front conventional air brake pipeline and the rear conventional air brake pipeline, and the control component is connected to the conventional air brake pipeline and the emergency pipeline for controlling the connection and disconnection between the front conventional air brake pipeline, the emergency pipeline and the air brake front module.

[0010] As a preferred embodiment of the present application, it also includes a three-way joint, and the three interfaces of the three-way joint are respectively connected to the front air brake module, the front conventional air brake pipeline and the emergency pipeline; the emergency pipeline includes a first connecting section connected to the spare tire, a second connecting section connected to the three-way joint, and a first branch and a second branch arranged between the first connecting section and the second connecting section, the two ends of the first branch are respectively connected to the first connecting section and the second connecting section, and the two ends of the second branch are respectively connected to the first connecting section and the second connecting section; the control component includes a manual control component arranged on the first branch and an automatic control component arranged on the second branch, the manual control component is used to control the on and off of the first branch, and the automatic control component is used to control the on and off of the second branch.

[0011] As a preferred embodiment of the present application, the manual control component is a manual knob valve arranged in the vehicle cab and the manual knob valve can realize two-way control; the automatic control component is a solenoid valve.

[0012] As a preferred embodiment of the present application, an acceleration structure is further provided at one end of the emergency pipeline close to the air brake front module, and the acceleration structure is used to accelerate the airflow entering the air brake front module from the emergency pipeline.

[0013] As a preferred embodiment of the present application, the acceleration structure adopts a Laval nozzle-like structure.

[0014] As a preferred embodiment of the present application, the control system also includes a foot brake, a one-way valve and a cut-off valve arranged on the front conventional air brake pipeline, the foot brake is used to control the on-off of the front conventional air brake pipeline, the one-way valve is unidirectionally conductive along the direction of the front conventional air brake pipeline-the front air brake module, and the cut-off valve is used to control the on-off of the front conventional air brake pipeline and the front air brake module.

[0015] As a preferred embodiment of the present application, the front air brake module includes a left front wheel end brake chamber, a right front wheel end brake chamber, a left front ABS control valve, a right front ABS control valve and a quick release valve, the quick release valve is connected to the emergency pipeline, the left front ABS control valve is respectively connected to the left front wheel end brake chamber and the quick release valve, and the right front ABS control valve is respectively connected to the right front wheel end brake chamber and the quick release valve.

[0016] In a second aspect, the present application also provides a method for using an air brake type front circuit emergency braking system, based on the above-mentioned air brake type front circuit emergency braking system, mainly comprising:

[0017] When the vehicle is running normally, the manual control valve and the electric control valve are in the closed state to completely disconnect the emergency pipeline from the air brake front module;

[0018] When the driver steps on the foot brake and the front conventional air brake pipeline and the rear conventional air brake pipeline work normally, the manual control valve and the electric control valve are in the closed state to completely disconnect the emergency pipeline from the front air brake module;

[0019] When the driver steps on the foot brake and the detection component detects that the front conventional air brake pipeline and / or the rear conventional air brake pipeline has failed to release pressure and the control system detects that the vehicle speed is greater than 30km / h, the automatic control component connects the first connecting section, the second branch and the second connecting section to allow the high-pressure gas stored in the spare tire to enter the front air brake module through the three-way connector; if the electronically controlled valve fails, the control system prompts the driver to manually open the manual control component to connect the first connecting section, the second branch and the second connecting section to allow the high-pressure gas stored in the spare tire to enter the front air brake module through the three-way connector.

[0020] As a preferred embodiment of the present application, in the parking state, when the detection component detects that the air pressure in the first connecting section, that is, the air pressure in the spare tire, is lower than the brake pressure required by the front air brake module, the driver steps on the foot brake and opens the manual control component to connect the front conventional air brake line, the second connecting section, the first branch, and the first connecting section to allow the gas in the front conventional air brake line to enter the spare tire.

[0021] As a preferred embodiment of the present application, the first connecting section is connected to a pressure relief valve, which opens to relieve pressure when the detection component detects that the air pressure inside the first connecting section exceeds the pressure limit of the spare tire.

[0022] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0023] 1. Rational use of vehicle resources, adding the front axle wheel-end brakes to the emergency braking condition, effectively improving the braking force during emergency braking and shortening the emergency braking distance. At the same time, it can also prevent the rear axle wheel-end brakes from overloading and failing, causing the vehicle to completely lose braking force. It also rationally utilizes the spare tire that has been idle for a long time. Without adding additional air storage devices, the front circuit emergency braking system uses an independent air source to avoid failure of the emergency braking system.

[0024] 2. Compared with the conventional emergency braking system, the high-pressure gas stored in the spare tire in this solution enters the wheel-end brake air chamber through the ABS control valve, avoiding the problem of vehicle loss of control caused by wheel-end locking during conventional emergency braking, effectively shortening the braking distance, and improving vehicle stability during emergency braking.

[0025] 3. It adopts two opening methods: manual control and electric automatic control, which has high reliability.

[0026] 4. The addition of a Laval tube-like structure can increase the flow rate of gas entering the wheel-end brake air chamber and shorten the response time of the braking system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 A schematic diagram of the structure of a front circuit emergency brake system of an air brake type in an example;

[0029] Figure 2 Schematic diagram of the structure of a front emergency air brake device in an example.

[0030] List of parts and reference numerals:

[0031] 1 air brake front module, 11 right front wheel end brake air chamber, 12 left front wheel end brake air chamber, 13 right front ABS control valve, 14 left front ABS control valve, 15 quick release valve;

[0032] 2. Tee connector;

[0033] 3 front conventional air brake pipeline, 31 one-way valve, 32 foot brake, 33 cut-off valve;

[0034] 4 front emergency air brake device, 41 spare tire, 42 emergency pipeline, 421 first connecting section, 422 second connecting section, 423 first branch, 424 second branch, 425 manual control part, 426 automatic control part;

[0035] 5 Acceleration structure;

[0036] 6Pressure relief valve. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0039] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0042] Reference Figure 1-Figure 2As shown, the present application discloses an air brake type front circuit emergency brake system, including an air brake front module 1, a front conventional air brake pipeline 3, a front emergency air brake device 4 and a control system, the front emergency air brake device 4 includes a spare tire 41 and an emergency pipeline 42 connected to the spare tire 41; it also includes a three-way connector 2, the three interfaces of the three-way connector 2 are respectively connected to the air brake front module 1, the front conventional air brake pipeline 3 and the emergency pipeline 42; the control system includes a detection component and a control component, the detection component is connected to the front conventional air brake pipeline 3, the rear conventional air brake pipeline and the emergency pipeline 42 for detecting the pipeline air pressure, and the control component is arranged on the front conventional air brake pipeline 3 and the emergency pipeline 42 for controlling the connection and disconnection between the front conventional air brake pipeline 3, the emergency pipeline 42 and the air brake front module 1.

[0043] According to the national standard GB / T 2977-2016, the spare tire pressure of commercial trucks can meet the braking needs of the air brake system. The above solution makes reasonable use of the spare tire that has been idle for a long time. Without adding additional air storage devices, the front circuit emergency brake system uses an independent air source to avoid failure of the emergency brake system. At the same time, the above solution can make reasonable use of the braking resources of the whole vehicle. By adding the front axle wheel end brake to the emergency braking condition, the braking force during the emergency braking process is effectively improved, which is conducive to shortening the emergency braking distance and can also avoid the overload failure of the rear axle wheel end brake, which causes the whole vehicle to completely lose its braking force.

[0044] In one example, referring to Figure 2 As shown, the emergency pipeline 42 includes a first connecting section 421 connected to the spare tire 41, a second connecting section 422 connected to the three-way connector 2, and a first branch 423 and a second branch 424 arranged between the first connecting section 421 and the second connecting section 422. The two ends of the first branch 423 are respectively connected to the first connecting section 421 and the second connecting section 422, and the two ends of the second branch 424 are respectively connected to the first connecting section 421 and the second connecting section 422. The control component includes a manual control component 425 arranged on the first branch 423 and an automatic control component 426 arranged on the second branch 424. The manual control component 425 is used to control the on-off of the first branch 423, and the automatic control component 426 is used to control the on-off of the second branch 424. Preferably, the manual control component 425 is a manual knob valve arranged in the vehicle cab and the manual knob valve can realize bidirectional control. Preferably, the automatic control component 426 is a solenoid valve, and the automatic control of the second branch 424 is realized by the solenoid valve.

[0045] By adopting the above scheme, two opening modes, manual control and electric automatic control, can be realized, so that the front circuit emergency braking system in this application can be automatically opened in an emergency situation, and can also be manually controlled to open when the electric control fails, with high reliability.

[0046] As a preferred embodiment of the present application, refer to Figure 1 As shown, an acceleration structure 5 is also provided at one end of the emergency pipeline 42 near the three-way connector 2, and the acceleration structure 5 accelerates the airflow entering the air brake front module 1 from the emergency pipeline 42. Preferably, the acceleration structure 5 adopts a Laval nozzle structure. The above solution can increase the gas flow rate, which is conducive to shortening the response time of the braking system.

[0047] Further, refer to Figure 1 As shown, the control system also includes a foot brake 32, a one-way valve 31, and a cut-off valve 33 arranged on the front conventional air brake pipeline 3. The foot brake 32 is used to control the on-off of the front conventional air brake pipeline 3 and the one-way valve 31 is arranged so that the front conventional air brake pipeline 3 can only be conducted along the direction of the front conventional air brake pipeline 3-air brake front module 1. The cut-off valve 33 is used to control the on-off between the front conventional air brake pipeline 3 and the three-way joint 2 to control the on-off between the front conventional air brake pipeline 3 and the air brake front module 1. The air brake front module 1 includes a left front wheel end brake air chamber 12, a right front wheel end brake air chamber 11, a left front ABS control valve 14, a right front ABS control valve 13, and a quick release valve 15. The quick release valve 15 is connected to the three-way joint 2, the left front ABS control valve 14 is respectively connected to the left front wheel end brake air chamber 12 and the quick release valve 15, and the right front ABS control valve 13 is respectively connected to the right front wheel end brake air chamber 11 and the quick release valve 15. Compared with conventional emergency braking systems, in this solution, the high-pressure gas stored in the spare tire 41 enters the wheel-end brake air chamber through the ABS control valve, avoiding the problem of vehicle loss of control caused by wheel-end locking during conventional emergency braking, effectively shortening the braking distance, and improving vehicle stability during emergency braking.

[0048] Based on the above structure, the present application also provides a method for using an air brake type front circuit emergency brake system, which mainly includes:

[0049] When the vehicle is running normally, the manual control valve and the electric control valve are in a closed state to completely disconnect the emergency pipeline 42 from the air brake front module 1;

[0050] When the driver steps on the foot brake 32 and the front conventional air brake pipeline 3 and the rear conventional air brake pipeline work normally, the manual control valve and the electric control valve are in a closed state to completely disconnect the emergency pipeline 42 from the front air brake module 1;

[0051] When the driver steps on the foot brake 32 and the detection component detects that the front conventional air brake pipeline 3 and / or the rear conventional air brake pipeline has failed to release pressure and the control system detects that the vehicle speed is greater than 30 km / h, the automatic control component 426 connects the first connecting section 421, the second branch 424 and the second connecting section 422 to allow the high-pressure gas stored in the spare tire 41 to enter the front air brake module 1 through the three-way connector 2; if the electric control valve fails, the control system prompts the driver to manually open the manual control component 425 to connect the first connecting section 421, the second branch 424 and the second connecting section 422 to allow the high-pressure gas stored in the spare tire 41 to enter the front air brake module 1 through the three-way connector 2.

[0052] In addition, in the parking state, when the detection component detects that the air pressure in the first connecting section 421, that is, the air pressure in the spare tire 41, is lower than the brake pressure required by the air brake front module 1, the driver steps on the foot brake 32 and opens the manual control component 425 to connect the air brake circuit, the second connecting section 422, the first branch 423, and the first connecting section 421 to allow the gas in the air brake circuit to enter the spare tire 41.

[0053] As a preferred embodiment of the present application, the first connecting section 421 is connected to a pressure relief valve 6 , which is opened to relieve pressure when the detection component detects that the internal air pressure of the first connecting section 421 exceeds the pressure limit of the spare tire 41 .

[0054] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0055] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A front circuit emergency braking system of air brake type, characterized in that: It includes a front air brake module, a front conventional air brake pipeline, a front emergency air brake device and a control system, wherein the front air brake module is connected to the front conventional air brake pipeline and the front emergency air brake device respectively; the front emergency air brake device includes a spare tire and an emergency pipeline connected to the spare tire; The control system includes a detection component and a control component. The detection component is respectively connected to the front conventional air brake pipeline and the rear conventional air brake pipeline for detecting the air pressure of the front conventional air brake pipeline and the rear conventional air brake pipeline. The control component is connected to the conventional air brake pipeline and the emergency pipeline for controlling the connection and disconnection between the front conventional air brake pipeline, the emergency pipeline and the front air brake module.

2. The front circuit emergency brake system of the air brake type as claimed in claim 1, characterized in that: It also includes a three-way joint, the three interfaces of which are respectively connected to the front air brake module, the front conventional air brake pipeline and the emergency pipeline; the emergency pipeline includes a first connecting section connected to the spare tire, a second connecting section connected to the three-way joint, and a first branch and a second branch arranged between the first connecting section and the second connecting section, the two ends of the first branch are respectively connected to the first connecting section and the second connecting section, and the two ends of the second branch are respectively connected to the first connecting section and the second connecting section; the control component includes a manual control component arranged on the first branch and an automatic control component arranged on the second branch, the manual control component is used to control the on and off of the first branch, and the automatic control component is used to control the on and off of the second branch.

3. The front circuit emergency brake system of the air brake type as claimed in claim 2, characterized in that: The manual control component is a manual knob valve arranged in the vehicle cab and the manual knob valve can realize two-way control; the automatic control component is a solenoid valve.

4. The front circuit emergency brake system of the air brake type as claimed in claim 1, characterized in that: An acceleration structure is also provided at one end of the emergency pipeline close to the air brake front module, and the acceleration structure is used to accelerate the airflow entering the air brake front module from the emergency pipeline.

5. The front circuit emergency brake system of the air brake type as claimed in claim 4, characterized in that: The acceleration structure adopts a Laval nozzle-like structure.

6. The front circuit emergency brake system of the air brake type as claimed in claim 1, characterized in that: The control system also includes a foot brake, a one-way valve and a cut-off valve arranged on the front conventional air brake pipeline, the foot brake is used to control the on-off of the front conventional air brake pipeline, the one-way valve is unidirectionally conductive along the direction of the front conventional air brake pipeline-the front air brake module, and the cut-off valve is used to control the on-off of the front conventional air brake pipeline and the front air brake module.

7. The front circuit emergency brake system of the air brake type as claimed in claim 1, characterized in that: The front air brake module includes a left front wheel end brake chamber, a right front wheel end brake chamber, a left front ABS control valve, a right front ABS control valve and a quick release valve. The quick release valve is connected to the emergency pipeline, the left front ABS control valve is respectively connected to the left front wheel end brake chamber and the quick release valve, and the right front ABS control valve is respectively connected to the right front wheel end brake chamber and the quick release valve.

8. A method for using an air brake type front circuit emergency brake system, characterized in that: The front circuit emergency brake system of the air brake type according to any one of claims 1 to 7 comprises: When the vehicle is running normally, the manual control valve and the electric control valve are in the closed state to completely disconnect the emergency pipeline from the air brake front module; When the driver steps on the foot brake and the front conventional air brake pipeline and the rear conventional air brake pipeline work normally, the manual control valve and the electric control valve are in the closed state to completely disconnect the emergency pipeline from the front air brake module; When the driver steps on the foot brake and the detection component detects that the front conventional air brake pipeline and / or the rear conventional air brake pipeline has failed to release pressure and the control system detects that the vehicle speed is greater than 30km / h, the automatic control component connects the first connecting section, the second branch and the second connecting section to allow the high-pressure gas stored in the spare tire to enter the front air brake module through the three-way connector; if the electronically controlled valve fails, the control system prompts the driver to manually open the manual control component to connect the first connecting section, the second branch and the second connecting section to allow the high-pressure gas stored in the spare tire to enter the front air brake module through the three-way connector.

9. The method for using the front circuit emergency brake system of the air brake type as claimed in claim 8, characterized in that: In the parking state, when the detection component detects that the air pressure in the first connecting section, that is, the air pressure inside the spare tire, is lower than the brake pressure required by the front air brake module, the driver steps on the foot brake and opens the manual control component to connect the front conventional air brake line, the second connecting section, the first branch, and the first connecting section to allow the gas in the front conventional air brake line to enter the spare tire.

10. The method for using the front circuit emergency brake system of the air brake type as claimed in claim 8, characterized in that: The first connecting section is connected to a pressure relief valve, which opens to relieve pressure when the detection component detects that the air pressure inside the first connecting section exceeds the pressure limit of the spare tire.

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